Question

Find f(-2) if f(x)=-x^3+2x^2+x-1

Answer 1

f(- 2) = 13

Explanation:

To evaluate f(- 2) substitute x = - 2 into f(x)

f(- 2) = - (- 2)³ + 2(- 2)² + (- 2) - 1

= - (- 8) + 2(4) - 2 - 1 = 8 + 8 - 2 - 1 = 13