Question

add. your answer should be an expanded polynomial in standard form. (8r^2 - 7r - 9) + (-r^2 + r) =

Explanation:

Step1: Combine like - terms of $r^{2}$

$8r^{2}+(-r^{2})=(8 - 1)r^{2}=7r^{2}$

Step2: Combine like - terms of $r$

$-7r + r=(-7 + 1)r=-6r$

Step3: Combine constant terms

There is only one constant term $-9$, so it remains as $-9$.

Answer:

$7r^{2}-6r - 9$