已知X=2.5,Y=1,求分式-X²+8XY-15Y²/X²-3XY-10Y²的值
已知X=2.5,Y=1,求分式-X²+8XY-15Y²/X²-3XY-10Y²的值
谢谢
谢谢
数学人气:765 ℃时间:2020-02-03 23:02:34
优质解答
原式=-(x-3y)(x-5y)/(x-5y)(x+2y)=-(x-3y)/(x+2y)=-1/9
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