计算(x-y＋4xy/x-y)·(x＋y-4xy/x＋y)的结果是
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(x-y＋4xy/x-y)·(x＋y-4xy/x＋y)
=[(x-y)²＋4xy]/(x-y) * [(x＋y)²-4xy]/(x＋y)
=(x+y)²/(x-y) * (x-y)²/(x＋y)
=(x+y)(x-y)
=[(x-y)²＋4xy]/(x-y) * [(x＋y)²-4xy]/(x＋y)
=(x+y)²/(x-y) * (x-y)²/(x＋y)
=(x+y)(x-y)
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展开全部
(x-y＋4xy/x-y)·(x＋y-4xy/x＋y)
=[(x-y)²＋4xy]/(x-y) * [(x＋y)²-4xy]/(x＋y)
=(x+y)²/(x-y) * (x-y)²/(x＋y)
=(x+y)(x-y)
=[(x-y)²＋4xy]/(x-y) * [(x＋y)²-4xy]/(x＋y)
=(x+y)²/(x-y) * (x-y)²/(x＋y)
=(x+y)(x-y)
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