Given: P(x) = 4x3 - 5x2 + 2x - 1

Question

Given: P(x) = 4x³ - 5x² + 2x - 1

Find P(-1)

Answer 1

I see this polynomial as  P(x) = 4x³ – 5x² + 2x – 1. If this is the case, then to find the answer, just plug into the polynomial the value of x = -1.

We have

                   P(-1) = 4(-1)³ – 5(-1)² + 2(-1) – 1 =  – 4  – 5 – 2 – 1 =  – 12

                                                                               Answer: – 12