通分:2xy/(x+y)2和x/x2−y2.

问题描述:

通分:

2xy
(x+y)2
x
x2y2

2xy
(x+y)2
x
x2y2
的分母分别是(x+y)2、x2-y2,它们的最小公倍数是(x+y)2(x-y),则
2xy
(x+y)2
x
x2y2
通分可得:
2xy(x−y)
(x+y)2(x−y)
x(x+y)
(x+y)2(x−y)