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数学
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通分 2X+2Y分之X-Y与(X+Y)²分之XY
人气:319 ℃ 时间:2019-12-13 18:13:00
解答
最简公分母是2(x+y)²
(x-y)/2x+2y=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y)²
xy/(x+y)²=2×xy/2(x+y)²=2xy/2(x+y)²
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