问题标题：
[(x-y)²+(x-y)(x+y)]÷2x初二数学计算.
问题描述：
[(x-y)²+(x-y)(x+y)]÷2x初二数学计算.
时彧回答：
[(x-y)²+(x-y)(x+y)]÷2x
=(x-y)(x-y+x+y)÷2x
=(x-y)*2x÷2x
=x-y
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