问题标题:
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)()填空
问题描述:
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)()填空
胡国新回答:
x(x+y)(x-y)-y(y+x)(y-x)
=x(x+y)(x-y)+(y+x)(x-y)
=(x+y)(x-y)(x+1)
=(x-y)(x+y)(x+1)
=(x-y)(x^2+x+xy+y)
刘心田回答:
=(x-y)(x^2+x+xy+y)你可确定答案,和我算的不一样?!
胡国新回答:
不好意思我做错了,下面是正确的x(x+y)(x-y)-y(y+x)(y-x)=x(x+y)(x-y)+y(y+x)(x-y)=(x+y)(x-y)(x+y)=(x-y)(x+y)^2
刘心田回答:
我说嘛,谢了
胡国新回答:
呵呵,不好意思啊~~~
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