作业帮通分x-y/2x+2y与xy/(x+y）的2次方
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通分x-y/2x+2y与xy/(x+y）的2次方
通分x-y/2x+2y与xy/(x+y）的2次方
通分x-y/2x+2y与xy/(x+y）的2次方
（x-y)/(2x+2y)
=(x-y)/2(x+y)
=(x-y)(x+y)/2(x+y)^2
xy/(x+y)^2
=2xy/2(x+y)^2
x - y/2x + 2y
=(x^2-y+4xy)/2x
=(x^2-y+4xy)(x+y)^2/2x(x+y)^2
xy/(x+y)^2
=2x^2y/2x(x+y)^2
=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y) 2;=(x 2;-y 2;)/2(x+y) 2; xy/(x+y) 2;=2xy/2(x+y) 2; x-y/2x+2y 与 xy/(x
x^2-y^2/2(x+y)^2,2xy/2(x+y)^2
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