Question

Calcule o resultado dessa conta
(-6y).(-7y).(-3)=?


Me ajudem e pra amanhã

Answer 1

Resposta:

$(-6y)*(-7y)*(-3)\\\\\mathrm{Remover\:os\:parenteses}:\quad \left(-a\right)=-a,\:-\left(-a\right)=a\\\\=-6y\cdot \:7y\cdot \:3\\\\\mathrm{Multiplicar\:os\:numeros:}\:6\cdot \:7\cdot \:3=126\\\\=-126yy\\\\\mathrm{Aplicar\:as\:propriedades\:dos\:expoentes}:\quad \:a^b\cdot \:a^c=a^{b+c}\\\\yy=\:y^{1+1}\\\\=-126y^{1+1}\\\\\mathrm{Somar:}\:1+1=2\\\\=-126y^2$