So is the function, f(x)= 2x²- 3x + 4 linear or nonlinear? Find f(-3) and f(3) for this function.

Question

I have the answer
f(x)= 2(3)²- 3(3) + 4 =29
and f(x)= 2x²- 3x + 4 =49
I hapo this is correct and this is non linear?

Answer 1

nonlinear,
f(3)=2*3^2-3*3+4=18-9+4
f(-3)=2*(-3)^2-3*(-3)+4=18+9+4