(x-y)的二次方乘(y-x)的五次方加二乘(x-y)乘(x-y)的四次方等于多少?

2024-11-23 01:54:15
推荐回答(1个)
回答(1):

解原式=-(x-y)^2(x-y)^5+2(x-y)(x-y)^4
=-(x-y)^7+2(x-y)^5