f(x)=3x3+4x2+x−8f(x) = 3x^3 + 4x^2 + x - 8f(x)=3x3+4x2+x−8
f(−2)=3(−2)3+4(−2)2+(−2)−8f(-2) = 3(-2)^3 + 4(-2)^2 + (-2) - 8f(−2)=3(−2)3+4(−2)2+(−2)−8
= −24+16−2−8-24 + 16 - 2 - 8−24+16−2−8
= -18
