Question

7x^(2) -2x (-4-x)
explain how you got the answer

Answer 1

`7 {x}^(2) - 2x( - 4 - x) = 9 {x}^(2) + 8x`

Explanation:

We want to simplify

`7 {x}^(2) - 2x( - 4 - x)`

We expand using the distributive property to obtain:

`7 {x}^(2) + 8x + 2 {x}^(2)`

We regroup the terms to get:

`7 {x}^(2) + 2 {x}^(2) + 8x`

We now simplify to get:

`9 {x}^(2) + 8x`

Therefore

`7 {x}^(2) - 2x( - 4 - x) = 9 {x}^(2) + 8x`