Answer:
[tex]7 {x}^{2} - 2x( - 4 - x) = 9 {x}^{2} + 8x[/tex]
Step-by-step explanation:
We want to simplify
[tex]7 {x}^{2} - 2x( - 4 - x)[/tex]
We expand using the distributive property to obtain:
[tex]7 {x}^{2} + 8x + 2 {x}^{2} [/tex]
We regroup the terms to get:
[tex]7 {x}^{2} + 2 {x}^{2} + 8x[/tex]
We now simplify to get:
[tex]9 {x}^{2} + 8x[/tex]
Therefore
[tex]7 {x}^{2} - 2x( - 4 - x) = 9 {x}^{2} + 8x [/tex]
