plz plz plz can u help me i am trying for so long plz .Write down the

1.	plz plz plz can u help me i am trying for so long plz .Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)
Answer» Solution Step-by-step explanation: (A) x³+3=0 x³= -3 (x³)³= (3)³ ( CUBING on both the SIDES) x³= 27 x=3 (B) 21-3x² 21-3x²=0 -3x²= -21 x²= 21/3 (x²)² = 7² x² = 49 x=7 (C) 5(3x+4) 5(3x+4) =0 15x+20=0 15x= -20 x = -20/15 better if we simply it. x = -4/3 Hope it will help you.

plz plz plz can u help me i am trying for so long plz .Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)

Answer»

Solution

Step-by-step explanation:

(A) x³+3=0

x³= -3

(x³)³= (3)³ ( CUBING on both the SIDES)

x³= 27

x=3

(B) 21-3x²

21-3x²=0

-3x²= -21

x²= 21/3

(x²)² = 7²

x² = 49

x=7

5(3x+4) =0

15x+20=0

15x= -20

x = -20/15

better if we simply it.

x = -4/3

Hope it will help you.

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plz plz plz can u help me i am trying for so long plz .Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)​

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plz plz plz can u help me i am trying for so long plz .Write down the each value of each expression for each value of x : a) x² + 3 b) 21 - 3x² c) 5(3x + 4)