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化简:x^2-2xy+y^2-1 除以 x-y-1
人气:411 ℃ 时间:2020-06-06 17:53:50
解答
:x^2-2xy+y^2-1 除以 x-y-1
=(x-y)²-1除以x-y-1
=(x-y+1)(x-y-1)除以x-y-1
=x-y+1
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