Question

Faça em seu caderno a seguintes multiplicações:

a) 3ab(2a+4b)

b) -y(y²-2y)

c) -2x(x²-3x+2)

d) (2x+y)3x²

 e) 3x²(2x³-x²+2x+1)

f) (a²+2ab+b²)3a²

Answer 1

$a)~~3ab(2a+4b) \to ~~ \boxed{6a^2b+12ab^2} \\\\\\ b)~~ -y(y^2-2y)\to~~ \boxed{-y^3+2y^2}\\\\\\ c)~~-2x(x^2-3x+2)\to ~~\boxed{ -2x^3+6x^2-4x}$



$d)~~ (2x+y)3x^2\to ~~ \boxed{6x^3+3x^2y}\\\\\\ e) ~~3 x^{2} (2x^3-x^2+2x+1)\to ~~ \boxed{6x^5-3x^4+6x^3+3x^2}\\\\\\ f) ~~(a^2+2ab+b^2)3a^2\to ~~ \boxed{3a^4+6a^3b+3a^2b^2}$