初二分式通分题,急!谢
问题描述：
初二分式通分题,急!谢
x/(x+y),(x+y)/(x^2-xy)
1/(6x-4y),2/(9x^2-4y^2)
1/(x+y)(y+z),1/(y+z)(x+z)
b/a(x+1)(2-x),a/b(1-x)(x-2)
答
X²（X-Y）/X(X-Y)(X+Y)（X+Y）²/X(X-Y)(X+Y)
3X+2Y/2(3X-2Y) 4/(3X-2Y)(3X+2Y)
X+Z/(x+y)(y+z)(X+Z)X+Y/(x+y)(y+z)(X+Z)
b²（1-X）/ab(x+1)(2-x)(1-X) -a²（X+1）/ab(x+1)(2-x)(1-X)
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