化简x⼀x+y + x⼀x-y

2025-06-29 06:42:25
推荐回答(1个)
回答1:

x/(x+y) + x/(x-y)
=[x(x-y)+x(x+y)]/[(x-y)(x+y)]
=2x^2/[(x-y)(x+y)]