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

Explanation:

`AB+C=(x+1)(x^2+2x-1)+(2x)`

`=x^3+2x^2-x+x^2+2x-1+2x`

`=x^3+3x^2+3x-1`