Question

The variables A, B, and C represent polynomials where A = x+1, B=x^2+2x-1, and C=2x. What is AB+C in simplest form

Answer 1

(x+1)(x^2+2x-1)+2x

x^3+2x^2-x+x^2+2x-1+2x

x^3+3x^2+3x-1

Answer 2

A B + C = ( x + 1 ) ( x² + 2 x - 1 ) + 2 x =
= x³ + 2 x² - x + x² + 2 x - 1 + 2 x = x³ + 3 x² + 3 x - 1
Answer: C)