Question

( -x3 - x2 + x ) – ( x3 + 2x2 + x )

Answer 1

Resposta:

$(-x^3-x^2+x)-(x^3+2x^2+x)=\\ \\ -x^3-x^2+x-x^3-2x^2-x=\\ \\ -x^3-x^3-x^2-2x^2+\not x-\not x=\\ \\ \boxed{-2x^3-3x^2}$