Question

计算(x-y)的m次方×(y-x)的2m次方+(y-x)的2m-1次方×(x-y)m+1次方=?

Answer 1

(x-y)^m ×(y-x)^2m +(y-x)^2m-1 ×(x-y)^m+1
=(x-y)^(3m)-(x-y)^(3m)
=0

Answer 2

化简步骤：提取公因式，合并同类项，整理就完了。如下：