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

问题描述:

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

X5*(-2Y)3+(-2xy)2*x3y
=x5*(-8y3)+(4x2y2)*x3y
=-8x5y3+4x5y3
=-4x5y3