Question

First (a) simplify the expression and then (b) evaluate the expression for x = -8.

2x + 5[x – 2(2 + x)]

Answer 1

A)
2x + 5 [x -2(2+x)]
2x + 5 (x -4 -2x)
2x +5 (-x -4)
2x -5x -20
-3x-20 => answer

B)
-3x -20
-3(-8) -20
24 -20
4 => answer

Answer 2

Answer: 4

Explanation:

a) Simplied Expresion

2x+5(x-2(2+x))

2x+5(x-4-2x)

2x+5(-x-4)

2x-5x-20

-3x-20

b) x=-8

-3(-8)-20= 4