Question

if f(x)=x^3+3x^2-2x+4 find f(-2)+f(2)-f(0)

Answer 1

f(-2) = (-2)^3 + 3(-2)^2 - 2(-2) + 4

= -8 + 12 + 4 + 4
=12

find f(2) and f(0) the same way, then
do
f(-2) + f(2) - f(0)