我做对了吗.x2(x-y)+y2(y-x)= x2(x-y)-y2(x-y)=x2-y2=(x+y）（x-y）

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我做对了吗.x2(x-y)+y2(y-x)= x2(x-y)-y2(x-y)=x2-y2=(x+y）（x-y）

我做对了吗.x2(x-y)+y2(y-x)= x2(x-y)-y2(x-y)=x2-y2=(x+y）（x-y）
我做对了吗.
x2(x-y)+y2(y-x)
= x2(x-y)-y2(x-y)
=x2-y2
=(x+y）（x-y）

我做对了吗.x2(x-y)+y2(y-x)= x2(x-y)-y2(x-y)=x2-y2=(x+y）（x-y）
不对
= x2(x-y)-y2(x-y)
=（x2-y2）(x-y)
=(x+y)(x-y) 2

不对吧~~ 那个2是平方的意思么？
如果是 答案应该是（x+y）（x-y）2

不对……
接两步：
=(x2-y2)(x-y)=
=(x+y)(x-y)2

错了
正确解法：
x²（x-y）+y²（y-x)
= x²（x-y）-y²(x-y)
= ( x²--y²)(x-y)
= (x-y)(x+y)(x-y)

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