1.

Factorise 6x +x² =-5

Answer»

Step-by-step explanation:

Factors are

y

=

(

x

−

1

)

(

x

−

5

)

Explanation:

If you have a quadratic function

a

x

2

+

B

x

+

c

, to factorise it you should identify TWO NUMBERS whose product is

a

c

and sum is

b

.

Here in

y

=

x

2

−

6

x

+

5

, we should identify two numbers whose product is

5

and sum is

−

6

.

Such numbers are

−

5

and

−

1

and now splitting MIDDLE term into these we get

y

=

x

2

−

5

x

−

x

+

5

or

y

=

x

(

x

−

5

)

−

1

(

x

−

5

)

=

(

x

−

1

)

(

x

−

5

)

.

Answer link


Discussion

No Comment Found

Related InterviewSolutions