Question

F(x) = -x² - x
Find f(-9).

Answer 1

-72

Explanation:

You just plug in -9 into x and calculate. -(-9)^2-(-9)=-72

Answer 2

Explanation:

Question: f(x) = -x² - x

Answer: f(-9)= -(-9)² - (-9)

f(-9)= -81 +9 = -72

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