分式通分三道题2xy/(x+y)的平方和x/x的平方-y的平方x-y/2x+2y和xy/(x+y)的平方2mn/4m的平
分式通分三道题
2xy/(x+y)的平方和x/x的平方-y的平方
x-y/2x+2y和xy/(x+y)的平方
2mn/4m的平方-9和2m-3/2m+3
2xy/(x+y)的平方和x/x的平方-y的平方
x-y/2x+2y和xy/(x+y)的平方
2mn/4m的平方-9和2m-3/2m+3
赞 琦丽儿 幼苗
共回答了17个问题采纳率：88.2% 举报
2xy/(x+y)^2和x/(x^2-y^2)
2xy/(x+y)^2=2xy(x-y) / [(x+y)^2(x-y)]
x/(x^2-y^2)=x(x+y)/[(x+y)^2(x-y)]
(x-y)/(2x+2y)和xy/(x+y)^2
(x-y)/(2x+2y)=(x+y)(x-y)/[2(x+y)^2]
xy/(x+y)^2=2xy/[2(x+y)^2]
2mn/(4m^2-9)和(2m-3)/(2m+3)
2mn/(4m^2-9)=2mn/[(2m+3)(2m-3)]
(2m-3)/(2m+3)=(2m-3)^2/[(2m+3)(2m-3)]
2xy/(x+y)^2=2xy(x-y) / [(x+y)^2(x-y)]
x/(x^2-y^2)=x(x+y)/[(x+y)^2(x-y)]
(x-y)/(2x+2y)和xy/(x+y)^2
(x-y)/(2x+2y)=(x+y)(x-y)/[2(x+y)^2]
xy/(x+y)^2=2xy/[2(x+y)^2]
2mn/(4m^2-9)和(2m-3)/(2m+3)
2mn/(4m^2-9)=2mn/[(2m+3)(2m-3)]
(2m-3)/(2m+3)=(2m-3)^2/[(2m+3)(2m-3)]
1年前
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