Question

初中数学题，请问这道题怎么做？

Answer 1

你真聪明，你写的第一步通分的过程都对了，为什么不继续做下去呢？距离成功只差一步而已，好好努力呀！
x-y+2y^2/(x+y)
=(x-y)(x+y)+2y^2/(x+y)
=(x^2-y^2+2y^2)/(x+y)
=(x^2+y^2)/(x+y)

Answer 2

哈哈，别人已经解答了，很明显，红色部分，不是你写的，应该是老师写的吧。

加油哦。
原式=(x-y)(x+y)/(x+y)+2y²/(x+y)
=(x²-y²+2y²)/(x+y)
=(x²+y²)/(x+y)

Answer 3

原式=(x-y)(x+y)/(x+y)+2y²/(x+y)
=(x²-y²+2y²)/(x+y)
=(x²+y²)/(x+y)

Answer 4

解：x-y+2y²/（x+y)=（x²-y²+2y²）/(x+y)=(x²+y²）/（x+y)..

Answer 5

x-y先化简成x+y分之（x-y)（x+y) 再加上后面的就等于x+y分之x方加y方 这就是结果了 不好化简了