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x^2-4y/4x^2-8xy
人气:103 ℃ 时间:2020-05-30 07:24:50
解答
(x^2-4y^2)/(4x^2-8xy)
=(x^2-4y^2)/4x(x-2y)
=(x+2y)(x-2y)/4x(x-2y)
=(x+2y)/4x
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