Answer:
[tex]f(x) = - 4 {x}^{2} + 9 \\ \\ f( - 3) = - 4 ({ - 3}^{2} ) + 9 \\ = -4 (9) + 9 \\ = - 36 + 9 \\ = - 27[/tex]
I hope I helped you^_^
-27
Step-by-step explanation:
to find f(-3) we must substitute x to -3 in the f(x)= -4x² +9
f(-3) = -4(-3)² +9
f(-3) = -4*9 +9
f(-3) = -36 +9
f(-3) = -27
