Question

resolva e reduza ( x+2x² )² -( 11+x )³ 

Answer 1

$(x+2x^2)^2-(11+x)^3\\x^2+4x^3+4x^4-((11+x)^2(11+x))\\x^2+4x^3+4x^4-((121+22x+x^2)(11+x))\\x^2+4x^3+4x^4-(x^3+33x^2+363x+1331)\\x^2+4x^3+4x^4-x^3-33x^2-363x-1331\\ \\\boxed{4x^4+3x^3-28x^2-363x-1331}$