约分2X^2Y(X-Y)/12XY^2(Y-X) 通分1/a^2-3a与1/a^2-9 通分1/2x-2与1/(x-1)^2约分2X^2Y(X-Y)/12XY^2(Y-X)通分1/a^2-3a与1/a^2-9通分1/2x-2与1/(x-1)^2通分1/（x+1）^2与2/x^2-1与3/(x-1)(x-2)

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约分2X^2Y(X-Y)/12XY^2(Y-X)通分1/a^2-3a与1/a^2-9通分1/2x-2与1/(x-1)^2约分2X^2Y(X-Y)/12XY^2(Y-X)通分1/a^2-3a与1/a^2

约分2X^2Y(X-Y)/12XY^2(Y-X) 通分1/a^2-3a与1/a^2-9 通分1/2x-2与1/(x-1)^2约分2X^2Y(X-Y)/12XY^2(Y-X)通分1/a^2-3a与1/a^2-9通分1/2x-2与1/(x-1)^2通分1/（x+1）^2与2/x^2-1与3/(x-1)(x-2)
约分2X^2Y(X-Y)/12XY^2(Y-X) 通分1/a^2-3a与1/a^2-9 通分1/2x-2与1/(x-1)^2
约分2X^2Y(X-Y)/12XY^2(Y-X)
通分1/a^2-3a与1/a^2-9
通分1/2x-2与1/(x-1)^2
通分1/（x+1）^2与2/x^2-1与3/(x-1)(x-2)

约分2X^2Y(X-Y)/12XY^2(Y-X) 通分1/a^2-3a与1/a^2-9 通分1/2x-2与1/(x-1)^2约分2X^2Y(X-Y)/12XY^2(Y-X)通分1/a^2-3a与1/a^2-9通分1/2x-2与1/(x-1)^2通分1/（x+1）^2与2/x^2-1与3/(x-1)(x-2)
2X^2Y(X-Y)/12XY^2(Y-X)
=－X/(6Y）
1/(a^2-3a)=1/[a(a-3)]=(a+3)/[a(a-3)(a+3)]
1/a^2-9=a/[a(a-3)(a+3)]
1/(2x-2)=(x-1)/[2(x-1)^2]
1/(x-1)^2=2/[2(x-1)^2]
1/(x+1)^2=(x-1)(x-2)/[(x+1)^2(x-1)(x-2)]
2/(x^2-1)=2(x+1)(x-2)/[(x+1)^2(x-1)(x-2)]
3/(x-1)(x-2)=3(x+1)^2/[(x+1)^2(x-1)(x-2)]

x^2-xy/xy-y^2约分 约分:x²-4/xy+2y 约分:x*2+xy/x*2+2xy+y*2 (x+y)y/xy^2 约分后是什么 约分x^2+xy/x^2-y^2 x的2次方-2x/2y-xy 约分 约分：x^2+xy/(x+y)^2= x^2+xy/(x+y)^2如何约分急,快 (x^2+xy)/(x+y)^2怎么约分? 约分2y-xy分之x²-2x 把分式xy-y/x-2x+1约分 6x^2-12xy+6y^2/3x-3y约分 约分:9xy^2+6xyz/3x^2y 约分：（x²-4）/（xy+2y） 约分：2x²y-2xy²/x²-2xy+y² x^2y+xy^2/xy^3-x^3y约分 用分式表示2x²y（x-y）÷[12xy²(y-x)]的商,并约分 用分式表示 2x平方y(x-y)除[12xy平方（y-x)]的商,并约分.