Question

(5x^2+2)-(-4x^2+7)+(-3x^2-5)

Answer 1

Answer:

$9 {x}^{2} - 3x$

Step-by-step explanation:

We want to simplify

$(5 {x}^{2} + 2) - ( - 4 {x}^{2} + 7) + ( - 3x - 5)$

We expand the parenthesis to get;

$5 {x}^{2} + 2 + 4 {x}^{2} - 7- 3x - 5$

We group similar terms to get:

$5 {x}^{2} + 4 {x}^{2}- 3x - 5 + 2 - 7$

Combine the terms;

$9 {x}^{2}- 3x + 0$

Therefore the simplified expression in standard form is:

$9 {x}^{2} - 3x$