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因式分解2x-2y-x²+y² 化简x²-y²/x²y+xy²
人气:246 ℃ 时间:2020-03-23 13:52:55
解答
因式分解2x-2y-x²+y²
=2(x-y)-(x+y)(x-y)
=(x-y)(2-x-y)

化简x²-y²/x²y+xy²
=(x+y)(x-y)/xy(x+y)
=(x-y)/xy
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