(x-y)²·(x-y)³-(x-y)的四次方·(y-x)=

问题描述:

(x-y)²·(x-y)³-(x-y)的四次方·(y-x)=

(x-y)²·(x-y)³-(x-y)的四次方·(y-x)
=(x-y)的5次方+(x-y)的5次方
=(x-y)的10次方