perform the operation. $(x^{2}+x - 2)+(-2x^{2}-9x - 7)$ answer attempt 1 out of 3

Explanation:

Step1: Remove parentheses

$x^{2}+x - 2-2x^{2}-9x - 7$

Step2: Combine like - terms for $x^{2}$ terms

$(x^{2}-2x^{2})+x - 2-9x - 7=-x^{2}+x - 2-9x - 7$

Step3: Combine like - terms for $x$ terms

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

Step4: Combine constant terms

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

Answer:

$-x^{2}-8x - 9$