x的5次方乘以(-2y)的三次方+(-2xy)的二次方乘以x的3次方y

问题补充：

x的5次方乘以(-2y)的三次方+(-2xy)的二次方乘以x的3次方y

答案：

X5*(-2Y)3+(-2xy)2*x3y

=x5*(-8y3)+(4x2y2)*x3y

=-8x5y3+4x5y3

=-4x5y3