Question

hel0 me 9ut pleàse$f(x) = 4{x}^{2} - 3x$$find \: f( - 3)$

Answer 1

We have the function f(x)

$f(x)=4x^2-3x$

We are asked to find f(-3), let's solve it

$\begin{gathered} f(-3)=4(-3)^2-3(-3) \\ f(-3)=4\cdot9+9 \\ f(-3)=36+9 \\ f(-3)=45 \end{gathered}$

In conclusion, the answer is f(3) = 45