(x-y)的3次方×(y-x)的平方×(y-x)的五次方=?
问题描述:
(x-y)的3次方×(y-x)的平方×(y-x)的五次方=?
答
原式=(x-y)²×(x-y)³×(y-x)^5
=(x-y)²×(x-y)³×[-(x-y)]^5
=(x-y)²×(x-y)³×(-1)^5×(x-y)^5
=-(x-y)^(2+3+5)
=-(x-y)^10