化简：x²-2xy+y²－1 —————— x-y - 知识问答

化简：x²-2xy+y²－1 —————— x-y+1

1个回答

x²-2xy+y²－1／x-y+1
=(x-y)²－1／x-y+1
=((x-y)+1)((x-y)－1)／x-y+1
=x-y-1
结果就是x-y-1

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