332354 + Interview Questions in Secondary School in Math

1.	Two people invested rupees 15000 and rupees 25000 respectively to start a business. They decided to share the profits in the ratio of their investments. If their profit is rupees 12000, how much money does each get.
Answer» Answer: 4500 & 7500 RS Step-by-step explanation: Two people INVESTED rupees 15000 and rupees 25000 respectively Total investment = 15000 + 25000 = 40000 Rs Total Profit = 12000 Rs Profit of Person with investment 15000 = (15000/40000) * 12000 = 4500 Rs Profit of Person with investment 25000 = (25000/40000) * 12000 = 7500 Rs Each gets 4500 & 7500 Rs

1.

Two people invested rupees 15000 and rupees 25000 respectively to start a business. They decided to share the profits in the ratio of their investments. If their profit is rupees 12000, how much money does each get.

Answer»

Answer:

4500 & 7500 RS

Step-by-step explanation:

Two people INVESTED rupees 15000 and rupees 25000 respectively

Total investment = 15000 + 25000 = 40000 Rs

Total Profit = 12000 Rs

Profit of Person with investment 15000 = (15000/40000) * 12000

= 4500 Rs

Profit of Person with investment 25000 = (25000/40000) * 12000

= 7500 Rs

Each gets 4500 & 7500 Rs

Discussion

2.	In triangle abc de\|\|bc ad=x db=x-2
Answer» so what we have to FIND your UESTION is not COMPLETE

2.

In triangle abc de||bc ad=x db=x-2

Answer»

so what we have to FIND

your UESTION is not COMPLETE

Discussion

3.	Plz solve my question plz it very important
Answer» Answer: HA ha ha what type of QUESTION can't explain

3.

Plz solve my question plz it very important

Answer»

Answer:

HA ha ha what type of QUESTION can't explain

Discussion

4.	सुनील ने पाँच वर्ष पहले एक मोटरसाइकिल 30000 रुपये में खरीदी।यदि मूल्यह्रास की निर्धारित वार्षिक दर 5% है और उसने इसे20000 रुपये में बेचा हो तो उसका लाभ/हानि प्रतिशत (%) क्याहोगा?(A) न लाभ-न हानि (B) हानि 25%(C) हानि 12.5%(D) लाभ 12.5%
Answer» ANSWER: hfkhhihfjhguvfhcgj हेलो हेलो आप क्या कर रहे हैं बस इस द हा हा हा हा हा हा हा मैं मैं पुलिस में दौड़ में चोरों को पकड़ वाले

4.

सुनील ने पाँच वर्ष पहले एक मोटरसाइकिल 30000 रुपये में खरीदी।यदि मूल्यह्रास की निर्धारित वार्षिक दर 5% है और उसने इसे20000 रुपये में बेचा हो तो उसका लाभ/हानि प्रतिशत (%) क्याहोगा?(A) न लाभ-न हानि (B) हानि 25%(C) हानि 12.5%(D) लाभ 12.5%

Answer»

ANSWER:

hfkhhihfjhguvfhcgj हेलो हेलो आप क्या कर रहे हैं बस इस द हा हा हा हा हा हा हा मैं

मैं पुलिस में दौड़ में चोरों को पकड़ वाले

Discussion

5.	Weather this question is solved by substitutionAur not
Answer» ANSWER: which QUESTION ? where is the question

5.

Weather this question is solved by substitutionAur not

Answer»

ANSWER:

which QUESTION ? where is the question

Discussion

6.	Simplify 6x(x-3)+(2-5x)+3x2
Answer» Answer: 6x+18x+2-5x+6 19x+8 like ,FOLLOW and MARK BRAINLIST

6.

Simplify 6x(x-3)+(2-5x)+3x2

Answer»

Answer:

6x+18x+2-5x+6

19x+8

like ,FOLLOW and MARK BRAINLIST

Discussion

7.	Write a Pythagorean triplet whose smallest member is 8
Answer» ANSWER: 8, 15, 17 Step-by-step explanation: Pythagoras triplets are of the form. 2m, m² -1 and m² + 1. It is GIVEN that SMALLEST number is 8. So, 2m = 8. m = 4. Now, second number = m² -1 = 4² - 1 = 15. and, third number = m² + 1 = 4² + 1 = 17. Hence, the TRIPLET is 8, 15 and 17. Verification :- 17² = 8² + 15² 289 = 64 + 225 289 = 289. Please brainlist my answer, if helpful!

7.

Write a Pythagorean triplet whose smallest member is 8

Answer»

ANSWER: 8, 15, 17

Step-by-step explanation:

Pythagoras triplets are of the form.

2m, m² -1 and m² + 1.

It is GIVEN that SMALLEST number is 8.

So, 2m = 8.

m = 4.

Now, second number = m² -1 = 4² - 1 = 15.

and, third number = m² + 1 = 4² + 1 = 17.

Hence, the TRIPLET is 8, 15 and 17.

Verification :-

17² = 8² + 15²

289 = 64 + 225

289 = 289.

Please brainlist my answer, if helpful!

Discussion

8.	(9/16×3) + (9/16×(-19)
Answer»

Discussion

9.	Two angels of a paralelogram are (2x+25)° and (3x-5)° find the value of x°
Answer» Step-by-step EXPLANATION: (2x+25)+(3x-5)=180 5x+20=180 5x=180-20=160 x=160÷5 =32

9.

Two angels of a paralelogram are (2x+25)° and (3x-5)° find the value of x°

Answer»

Step-by-step EXPLANATION:

(2x+25)+(3x-5)=180

5x+20=180

5x=180-20=160

x=160÷5

=32

Discussion

10.	Find the area of a rectangle whose sides are 9 cm and 6 CM
Answer» AREA of rectangle=l × B = 9×6 = 54cm²

10.

Find the area of a rectangle whose sides are 9 cm and 6 CM

Answer»

AREA of rectangle=l × B

= 9×6

= 54cm²

Discussion

11.	the temperature at 12 noon was 10°C above zero If it decreases at the rate of 2°C per hour until midnight at what time would the temperature be 8°C below zero? what would be the temperature at midnight
Answer» Answer:9 pm Step-by-step explanation:As it decreases by 2 degree PER hour the temp now is 10 degree we NEED -8 degree as final so the temperature needed to decrease is 18 DEGREES. So 2 degree per hour means you need 9 HOURS to decrease 18 degrees. So 12 noon +9 hours gives you 9pm. Hope your doubt is cleared. Thank you.

11.

the temperature at 12 noon was 10°C above zero If it decreases at the rate of 2°C per hour until midnight at what time would the temperature be 8°C below zero? what would be the temperature at midnight

Answer»

Answer:9 pm

Step-by-step explanation:As it decreases by 2 degree PER hour the temp now is 10 degree we NEED -8 degree as final so the temperature needed to decrease is 18 DEGREES. So 2 degree per hour means you need 9 HOURS to decrease 18 degrees. So 12 noon +9 hours gives you 9pm.

Hope your doubt is cleared.

Thank you.

Discussion

12.	(11) - 7x from 3x2 subtract
Answer» ANSWER: The answer for the QUESTION is 3×2-(-7X) =6+7x

12.

(11) - 7x from 3x2 subtract

Answer»

ANSWER:

The answer for the QUESTION is

3×2-(-7X)

=6+7x

Discussion

13.	2 X 22 upon 7 x 3 can you solve this?
Answer» Answer: 2x22/7x3 =44/21 =2x2/21

13.

2 X 22 upon 7 x 3 can you solve this?

Answer»

Answer:

2x22/7x3

=44/21

=2x2/21

Discussion

14.	Two supplementary angles are in the ratio of 2:7. Find the complementary of the smaller angle
Answer» Answer: 2+7=9 2/990 =20 7/990 =70

14.

Two supplementary angles are in the ratio of 2:7. Find the complementary of the smaller angle

Answer»

Answer:

2+7=9

2/9*90 =20

7/9*90 =70

Discussion

15.	Please solve the question
Answer» 1-(1/3+1/3) =1-2/3 =3/3-2/3 =1/3 Therefore,1/3students of the CLASS didn't GET any WORK

15.

Please solve the question

Answer»

1-(1/3+1/3)

=1-2/3

=3/3-2/3

=1/3

Therefore,1/3students of the CLASS didn't GET any WORK

Discussion

16.	Hcf of x2- y2 and x2_y2 is
Answer» ANSWER: x2-y2=(X + y)(x-y) x2-y2=(x+y)(x-y) HCF=(x+y), (x-y)

16.

Hcf of x2- y2 and x2_y2 is

Answer»

ANSWER:

x2-y2=(X + y)(x-y)

x2-y2=(x+y)(x-y)

HCF=(x+y), (x-y)

Discussion

17.	Triangle ABC is an isosceles triangle in which AB equal to AC show that angle B equal to angle C
Answer» Answer: Hope it helped you. MARK me as BRAIN LIST.

17.

Triangle ABC is an isosceles triangle in which AB equal to AC show that angle B equal to angle C

Answer»

Answer:

Hope it helped you.

MARK me as BRAIN LIST.

Discussion

18.	Dash of 3XY is equal to 2
Answer» ANSWER: PLEASE ASK the QUESTING PROPERLY

18.

Dash of 3XY is equal to 2

Answer»

ANSWER:

PLEASE ASK the QUESTING PROPERLY

Discussion

19.	Mrs Khorana bought 2kg salt, 500g butter, 50g coffee, 1kg deal, 75pg tea,and 100g jeera. What was the total weight of the thing's she bought.
Answer» Answer: 3kg725g Step-by-step explanation: 2+1=3 500+50+75+100=725 therefore TOTAL amount=3kg725g

19.

Mrs Khorana bought 2kg salt, 500g butter, 50g coffee, 1kg deal, 75pg tea,and 100g jeera. What was the total weight of the thing's she bought.

Answer»

Answer:

3kg725g

Step-by-step explanation:

2+1=3

500+50+75+100=725

therefore TOTAL amount=3kg725g

Discussion

20.	Basic Concent of Geometry0.1Solve any Four of the following.How many midpoint does a segment have?Write convese of If quadrilateral is rectangle then diagonals are congruent.?Write the following statement in conditional form - Angles in a linear pair are supplementry.Which figure is formed by three non collinear points ?The distance between any two points in always ....... real number
Answer» Answer: 1) one 2) If DIAGONALS are congruent then quadrilateral FORMED is a rectangle 3) Angles in a linear pair are supplementary if their SUM is 180° 4) triangle 5) positive hope it helps you .......! #JAI HINDH ❤️

20.

Basic Concent of Geometry0.1Solve any Four of the following.How many midpoint does a segment have?Write convese of If quadrilateral is rectangle then diagonals are congruent.?Write the following statement in conditional form - Angles in a linear pair are supplementry.Which figure is formed by three non collinear points ?The distance between any two points in always ....... real number

Answer»

Answer:

1) one

2) If DIAGONALS are congruent then quadrilateral FORMED is a

rectangle

3) Angles in a linear pair are supplementary if their SUM is

180°

4) triangle

5) positive

hope it helps you .......!

#JAI HINDH ❤️

Discussion

21.	-7 x 2 from 3 x 2 subtract
Answer» 20 ANSWER is to the QUESTION

Discussion

22.	Solve by long division and the numbers correct to two places of decimal
Answer» Step-by-step EXPLANATION: HOPE I HELP you PLEASE THANKS me

22.

Solve by long division and the numbers correct to two places of decimal

Answer»

Step-by-step EXPLANATION:

HOPE I HELP you PLEASE THANKS me

Discussion

23.	Roman numeral for 456
Answer» ROMAN NUMERALS: 456 = CDLVI

Discussion

24.	- Split 207 into three parts such that these arein AP and the product of the two smallerparts is 4623
Answer» Answer: The NUMBERS are 71, 67 and 69. Step-by-step EXPLANATION: Let the three numbers be a - d, a , a + d Given to us: The sum of the three numbers = 207 Product of the smaller parts = 4623 Sum of the numbers: a - d + a + a + d = 207 3a = 207 a = 207 / 3 a = 69 Multiplying the two smaller parts: (a-d) (a) = 4623 Substituting the value of a which is obtained, (69 - d) (69) = 4623 (69 - d) = 4623 / 69 69 - d = 67 ∴ d = 69 - 67 = 2 The numbers are as follows: a + d = 69 + 2 = 71 a - d = 69 - 2 = 67 a = 69 Therefore, the numbers are: 71, 67 and 69

24.

- Split 207 into three parts such that these arein AP and the product of the two smallerparts is 4623

Answer»

Answer:

The NUMBERS are 71, 67 and 69.

Step-by-step EXPLANATION:

Let the three numbers be a - d, a , a + d

Given to us:

The sum of the three numbers = 207

Product of the smaller parts = 4623

Sum of the numbers:

a - d + a + a + d = 207

3a = 207

a = 207 / 3

a = 69

Multiplying the two smaller parts:

(a-d) (a) = 4623

Substituting the value of a which is obtained,

(69 - d) (69) = 4623

(69 - d) = 4623 / 69

69 - d = 67

∴ d = 69 - 67 = 2

The numbers are as follows:

a + d = 69 + 2 = 71

a - d = 69 - 2 = 67

a = 69

Therefore, the numbers are:

71, 67 and 69

Discussion

25.	OfInsideAxyandgiven below, writedetermine the thirdthe nameangle.40400SolveL2x + 2y + 1 = 80°40 + 2Y +40 - 50/* +60 - 180°\| 2y = 180° - so2Y = 1002 y = 1001
Answer» Answer: cjghxhf uh-huh you are not the one I have no how are things that you can come get it for you guys have to do that for a BIT and then we are not a problem at work now but I'll TRY not a bad day for the FIRST one I GOT to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my PHONE

25.

OfInsideAxyandgiven below, writedetermine the thirdthe nameangle.40400SolveL2x + 2y + 1 = 80°40 + 2Y +40 - 50/* +60 - 180°| 2y = 180° - so2Y = 1002 y = 1001

Answer»

Answer:

cjghxhf uh-huh you are not the one I have no how are things that you can come get it for you guys have to do that for a BIT and then we are not a problem at work now but I'll TRY not a bad day for the FIRST one I GOT to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my and it will take me out with my to get to the to pick my PHONE

Discussion

26.	√146894400 how to solve
Answer» ANSWER: by LONG DIVISION . the answer will be DECIMAL POINT

26.

√146894400 how to solve

Answer»

ANSWER:

by LONG DIVISION . the answer will be DECIMAL POINT

Discussion

27.	Estimate 12457 to nearest 100
Answer» 12500 is the ANSWER to the QUESTION

Discussion

28.	(d) 8,000 for 1 year at 9% per annum compounded half yearly.(You could use the year by year calculation using SI formula to verify).
Answer» ANSWER: The TOTAL AMOUNT at the end of the YEAR will be 9504 rupees

28.

(d) 8,000 for 1 year at 9% per annum compounded half yearly.(You could use the year by year calculation using SI formula to verify).

Answer»

ANSWER:

The TOTAL AMOUNT at the end of the YEAR will be 9504 rupees

Discussion

29.	Vuruu ure discount and the selling price or the parleThe marked price of a water cooler is 5,400. The shopkeeper offers an off seasondiscount of 20% on it. Find its selling price.
Answer» Answer: RUPEES 4320 Step-by-step EXPLANATION: MP OF THE COOLER =RUPEES 5400 DISCOUNT=20% SO,SP=5400-20/100×5400 =4320 PLEASE MARK ME AS BRAINLIEST

29.

Vuruu ure discount and the selling price or the parleThe marked price of a water cooler is 5,400. The shopkeeper offers an off seasondiscount of 20% on it. Find its selling price.

Answer»

Answer:

RUPEES 4320

Step-by-step EXPLANATION:

MP OF THE COOLER =RUPEES 5400

DISCOUNT=20%

SO,SP=5400-20/100×5400

=4320

PLEASE MARK ME AS BRAINLIEST

Discussion

30.	Plzz answer me fast it is urgent
Answer» OPPOSITE SIGN SE MULTIPLY KRO

30.

Plzz answer me fast it is urgent

Answer»

OPPOSITE SIGN SE MULTIPLY KRO

Discussion

31.	The total surface area of cube=6×(edge)^2 6×6×5cm2. See that part of cube where the hemisphere is attached is not included in surface area.
Answer» ANSWER: FOLLOW me PLSS plss for answer

31.

The total surface area of cube=6×(edge)^2 6×6×5cm2. See that part of cube where the hemisphere is attached is not included in surface area.

Answer»

ANSWER:

FOLLOW me PLSS plss

for answer

Discussion

32.	E following is not a even number?2)81) 24) 103) 15
Answer» ANSWER: HEY MATE UR answer is 15

32.

E following is not a even number?2)81) 24) 103) 15

Answer»

ANSWER:

HEY MATE UR answer is 15

Discussion

33.	(ii) 2 (x - 1) = x + 2
Answer» Answer: 2 x MINUS 2 EQUAL to x + 2 2 x equal to 2 x + 2 + 2 2 x equal to 2 x + 4 2 x + 4 - 2x 4 answer please follow me

33.

(ii) 2 (x - 1) = x + 2

Answer»

Answer:

2 x MINUS 2 EQUAL to x + 2

2 x equal to 2 x + 2 + 2

2 x equal to 2 x + 4

2 x + 4 - 2x

4 answer

please follow me

Discussion

34.	4. Which one of the following is an irrational number:(a) 4 (b) 3 8 (c) 100 (d)  0.64
Answer» Step-by-step EXPLANATION: All are RATIONAL.................

34.

4. Which one of the following is an irrational number:(a) 4 (b) 3 8 (c) 100 (d)  0.64

Answer»

Step-by-step EXPLANATION:

All are RATIONAL.................

Discussion

35.	Find the HCF of the following by prime factorization method72 and 8063 and 8452 and 7842 and 7080 and 9612 and 16 15 and 7520 and 3534 and 10270, 105 and 17524, 60 and 14424, 60 and 14454, 60 and 90
Answer» Step-by-step explanation: 72÷2=36 36÷2=18 18÷2=9 9÷3=3 3÷3=1 2×2×2×3×3=72

35.

Find the HCF of the following by prime factorization method72 and 8063 and 8452 and 7842 and 7080 and 9612 and 16 15 and 7520 and 3534 and 10270, 105 and 17524, 60 and 14424, 60 and 14454, 60 and 90

Answer»

Step-by-step explanation:

72÷2=36 36÷2=18 18÷2=9 9÷3=3 3÷3=1 2×2×2×3×3=72

Discussion

36.	99. Is 9720 a perfect cube? If not, find the smallest number by which itshould be divided to get a perfect cube.
Answer» Answer: 75 Step-by-step explanation: 9720=2×2×2×5×3×3×3×3×3 =(2cube)(3cube)3×3×5 the NUMBER is 3×5×5=75

36.

99. Is 9720 a perfect cube? If not, find the smallest number by which itshould be divided to get a perfect cube.

Answer»

Answer:

75

Step-by-step explanation:

9720=2×2×2×5×3×3×3×3×3

=(2cube)(3cube)3×3×5

the NUMBER is 3×5×5=75

Discussion

37.	Cansomeone please hel me with this
Answer» ANSWER: Step-by-step EXPLANATION:

37.

Cansomeone please hel me with this

Answer»

ANSWER:

Step-by-step EXPLANATION:

Discussion

38.	Draw the rough sketch of the function f(x)=x×\|x\|
Answer» ANSWER: f(X)= x^2 Step-by-step EXPLANATION: f(x) = x.\|x\| f(x) = x. x f(x) = x^2 Hope it HELPED you.

38.

Draw the rough sketch of the function f(x)=x×|x|

Answer»

ANSWER:

f(X)= x^2

Step-by-step EXPLANATION:

f(x) = x.|x|

f(x) = x. x

f(x) = x^2

Hope it HELPED you.

Discussion

39.	Subtract the first integers from the second 25-8
Answer» Answer: 17 Step-by-step EXPLANATION: 25 - 8 ------------ 17 ------------

39.

Subtract the first integers from the second 25-8

Answer»

Answer:

17

Step-by-step EXPLANATION:

25

- 8

------------

17

------------

Discussion

40.	Hcf of x2_y2and x3_y3 is
Answer» ANSWER: The HIGHEST COMMON FACTOR of x^2-y^2 and x^3 and y^3 be will x-y

40.

Hcf of x2_y2and x3_y3 is

Answer»

ANSWER:

The HIGHEST COMMON FACTOR of x^2-y^2 and x^3 and y^3 be will x-y

Discussion

41.	a horse is tied to a peg at one corner of a square shaped grass field of side 15m. by means of a 5m.long rope find 1. the area of that part of the field in which the horse can graze .2. the increase in the the grazing area if the rope were 10m. long instead of 5m. use π= 3.14
Answer» ANSWER: area that horse can graze=19.625 increase in area =58.785 Step-by-step explanation: radius of SMALLER circle r₁= 5m area that horse can graze= (πr₁²)/4 =(3.1455)/4 =19.625 m² radius after the EXTENSION of rope=r₂ area that horse graze after the extension of rope= (πr₂²)/4 =(3.141010)/4 =314/4 =78.5 m² increase in area =area after- area before =78.5-19.625 =58.785 m²

41.

a horse is tied to a peg at one corner of a square shaped grass field of side 15m. by means of a 5m.long rope find 1. the area of that part of the field in which the horse can graze .2. the increase in the the grazing area if the rope were 10m. long instead of 5m. use π= 3.14

Answer»

ANSWER:

area that horse can graze=19.625

increase in area =58.785

Step-by-step explanation:

radius of SMALLER circle r₁= 5m

area that horse can graze= (π*r₁²)/4

=(3.14*5*5)/4

=19.625 m²

radius after the EXTENSION of rope=r₂

area that horse graze after the extension of rope= (π*r₂²)/4

=(3.14*10*10)/4

=314/4

=78.5 m²

increase in area =area after- area before

=78.5-19.625

=58.785 m²

Discussion

42.	Find the the LCM of of 540 and 360 give their HCF as 180
Answer» Answer: I have TRIED to SOLVE your question,HOPE it HELPS!

42.

Find the the LCM of of 540 and 360 give their HCF as 180

Answer»

Answer:

I have TRIED to SOLVE your question,HOPE it HELPS!

Discussion

43.	5 yrs ago age of mother was 2 times the age of daughter .... Represent this statement graphically as ljnear eq. In 2 variable
Answer» If X is the PRESENT age of DAUGHTER (x-5)*2= age of MOTHER

Discussion

44.	120kw=_______mw 10 HP =______ w1000w= _______mw
Answer» Answer: 120 kw=120000000mw 10HP=7456.999w 1000w=0.001mw

44.

120kw=_mw 10 HP = w1000w= ___mw

Answer»

Answer:

120 kw=120000000mw 10HP=7456.999w 1000w=0.001mw

Discussion

45.	Find the cube of the following -3
Answer» Step-by-step EXPLANATION: CUBE of -3 is -27 cube of -3/5 is -27/125

45.

Find the cube of the following -3

Answer»

Step-by-step EXPLANATION:

CUBE of -3 is -27

cube of -3/5 is -27/125

Discussion

46.	If the cost of 'm' metres of clothe is 'y'.Find the cost of 4 metres of cloth.
Answer» Answer: Step-by-step EXPLANATION: Cost of 'm' METRES of cloth = y Cost of 4 metres of cloth = 4y

46.

If the cost of 'm' metres of clothe is 'y'.Find the cost of 4 metres of cloth.

Answer»

Answer:

Step-by-step EXPLANATION:

Cost of 'm' METRES of cloth = y

Cost of 4 metres of cloth = 4y

Discussion

47.	18) Ifx+iy= (a+ib)3, show that x/a+y/b=4(a2-b2)
Answer» Step-by-step EXPLANATION: $= x + iy = {(a + ib)}^{3} \\ = x + iy = {a}^{3} + {i}^{3} {b}^{3} + 3aib(a + ib) \\ = x + iy = {a}^{3} - i{b}^{3} + 3i {a}^{2} b - 3a {b}^{2} \\ = x + iy = ({a}^{3} - 3a {b}^{2} ) \: + i(3 {a}^{2} b - {b}^{3} ) \\ on \: comparing \: on \: both \: sides \\ x = {a}^{3} - 3a {b}^{2} ,\: \: y = 3 {a}^{2}b - {b}^{3} \\ \frac{x}{a} = {a}^{2} - 3 {b}^{2} , \: \: \frac{y}{b} = 3 {a}^{2} - {b}^{2} \\ \frac{x}{a} + \frac{y}{b} = {a}^{2} - 3 {b}^{2} + 3 {a}^{2} - {b}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 4 {a }^{2} - 4 {b}^{2} = 4( {a}^{2} - {b}^{2} )$ HOPE it will HELP you...

47.

18) Ifx+iy= (a+ib)3, show that x/a+y/b=4(a2-b2)

Answer»

Step-by-step EXPLANATION:

$= x + iy = {(a + ib)}^{3} \\ = x + iy = {a}^{3} + {i}^{3} {b}^{3} + 3aib(a + ib) \\ = x + iy = {a}^{3} - i{b}^{3} + 3i {a}^{2} b - 3a {b}^{2} \\ = x + iy = ({a}^{3} - 3a {b}^{2} ) \: + i(3 {a}^{2} b - {b}^{3} ) \\ on \: comparing \: on \: both \: sides \\ x = {a}^{3} - 3a {b}^{2} ,\: \: y = 3 {a}^{2}b - {b}^{3} \\ \frac{x}{a} = {a}^{2} - 3 {b}^{2} , \: \: \frac{y}{b} = 3 {a}^{2} - {b}^{2} \\ \frac{x}{a} + \frac{y}{b} = {a}^{2} - 3 {b}^{2} + 3 {a}^{2} - {b}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 4 {a }^{2} - 4 {b}^{2} = 4( {a}^{2} - {b}^{2} )$

HOPE it will HELP you...

Discussion

48.	Add 7x -2y -4z to -2x +3y -5z
Answer» ANSWER: (7x-2y-4z) +(-2x+3y-5z) =7x-2y-4z-2x+3y-5z =5x+y-9z that is answer

48.

Add 7x -2y -4z to -2x +3y -5z

Answer»

ANSWER:

(7x-2y-4z) +(-2x+3y-5z)

=7x-2y-4z-2x+3y-5z

=5x+y-9z

that is answer

Discussion

49.	Circle have corner and side
Answer» ANSWER: CIRCLES have INFINITE SIDES and has no CORNERS

49.

Circle have corner and side

Answer»

ANSWER:

CIRCLES have INFINITE SIDES and has no CORNERS

Discussion

50.	Find the smallest number that has to be subtracted from 256, so that it becomes exactlydivisible by 10?31PLAYING WITH NUMBERS
Answer» Step-by-step explanation: SMALLEST number that has to be subtracted from 256, so that it BECOMES exactly divisible by 10 is =6

50.

Find the smallest number that has to be subtracted from 256, so that it becomes exactlydivisible by 10?31PLAYING WITH NUMBERS

Answer»

Step-by-step explanation:

SMALLEST number that has to be subtracted from 256, so that it BECOMES exactly

divisible by 10 is

=6

Discussion

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