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计算:5x的平方-4xy分之x的平方-y的平方÷5x-4y分之x y
人气:435 ℃ 时间:2020-05-14 21:28:36
解答
(x²-y²)/(5x²-4xy)÷(x+y)/(5x-4y)
=(x+y)(x-y)/x(5x-4y)*(5x-4y)/(x+y)
=(x-y)/x
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