计算:(x-y)(x+y+)=________.

发布时间:2020-08-07 09:23:58

计算:(x-y)(x+y+)=________.

网友回答

x2
解析分析:本题可将(x-y),(x+y)看作一个整体简便计算.
平方差公式:(x-y)(x+y)=x2-y2.

解答:(x-y)(x+y+)
=(x-y)(x+y)+(x-y)
=x2-y2+y2
=x2.
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