Question

Calcule o valor da expressao: x(2x-y)-2y(x-y)+xy(x+3).

Answer 1

$x \cdot(2x-y)-2y \cdot(x-y)+xy \cdot(x+3) \\ \\ 2x^2-xy-2xy+2y^2+x^2y+3xy \\ \\ 2x^2+2y^2+x^2y-xy-2xy+3xy \\ \\ 2x^2+2y^2+x^2y-3xy+3xy\\ \\ \boxed{ 2x^2+2y^2+x^2y}$


Bons estudos!