Question

Find f(–2), if f(x) = −3x^2 – 5x + 11

Answer 1

To solve the exercise, replace x = -2 in the function and operate, like this

$\begin{gathered} f\mleft(x\mright)=-3x^2-5x+11 \\ f(-2)=-3(-2)^2-5(-2)+11 \\ f(-2)=-3\cdot4+10+11 \\ f(-2)=-12+10+11 \\ f(-2)=9 \end{gathered}$

Therefore, the value of the function is 9 when x = -2.