解
(x-y)²(y-x)^5
=(y-x)²(y-x)^5
=(y-x)^7如果把Y-X化成X-Y怎么算？(x-y)²(y-x)^5=(x-y)²[-(x-y)]^5=-(x-y)²(x-y)^5=-(x-y)^7=(y-x)^7