Question

Qual a forma mais simples da esprecão de (3xy).(-4xy)-(-10x y):(2xy

Answer 1

$\left(3xy\right)\left(-4xy\right)-\frac{-10xy}{2xy}\\\\\mathrm{Remover\:os\:parenteses}:\\\\=-3xy\cdot \:4xy-\frac{-10xy}{2xy}\\\\=-12x^2y^2-\left(-5\right)\\\\\mathrm{Aplicar\:a\:regra}\:-\left(-a\right)=a\\\\=-12x^2y^2+5$