Question

I need help please??

Answer 1

Answer

C. -9

Explanation

Given function:

$f(x)=x^2+x-9$

To find f(-1), plug in x = -1 into f(x)

$\begin{gathered} f(-1)=(-1)^2+(-1)-9 \\ f(-1)=1-1-9 \\ f(-1)=-9 \end{gathered}$