Question

perform the indicated operation.
$(12x + 9)+(-x^{2}-12x + 8)$
$(12x + 9)+(-x^{2}-12x + 8)=\square$ (simplify your answer.)
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Explanation:

Step1: Remove parentheses

$12x + 9 - x^2 - 12x + 8$

Step2: Combine like $x$ terms

$12x - 12x = 0$

Step3: Combine constant terms

$9 + 8 = 17$

Step4: Rewrite simplified expression

$-x^2 + 17$

Answer:

$-x^2 + 17$