(x-y)的2次幂乘x-y)的3次幂乘(y-x)的2次幂乘(y-x)的3次幂

问题描述:

(x-y)的2次幂乘x-y)的3次幂乘(y-x)的2次幂乘(y-x)的3次幂

(x-y)²(x-y)³(y-x)²(y-x)³
=(x-y)的五次方(y-x)的五次方
=(x-y)的五次方[-(x-y)的五次方]
=-(x-y)的十次方