x-y/2x+2y与xy/(x+y)^2 初二通分题 两道 100财富
x-y/2x+2y与xy/(x+y)^2 初二通分题 两道 100财富
x-y/2x+2y与xy/(x+y)^22mn/4m^2-9与2m-3/2m+3
x-y/2x+2y与xy/(x+y)^22mn/4m^2-9与2m-3/2m+3
数学人气:905 ℃时间:2020-03-28 07:08:16
优质解答
x-y/2x+2y与xy/(x+y)^22x+2y与(x+y)^2的最小公倍数是2(x+y)^2x-y/2x+2y=x-y/2(x+y)=(x-y)(x+y)/2(x+y)^2=x^2-y^2/2(x+y)^2xy/(x+y)^2=2xy/2(x+y)^22.2mn/4m^2-9与2m-3/2m+34m^2-9=(2m)^2-3^2=(2m+3)(2m-3)与2m+3的...
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