求救簡單數學
回答 (3)
2009-10-25 5:42 pm
✔ 最佳答案
x-y/x+y除2x-2y/y=x-y/x+y乘y/2x-2v
=x-y/x+y乘y/2(x-y)
=y/2(x+y)
參考: ME
2009-10-24 3:01 pm
(x-y/x+y) / (2x-2y/y)
= (x-y/x+y) * (y/2x-2y)
= (x-y/x+y) * [y/2(x-y)]
= y(x-y) / 2(x+y)(x-y)
= y / 2(x+y)
= (x-y/x+y) * (y/2x-2y)
= (x-y/x+y) * [y/2(x-y)]
= y(x-y) / 2(x+y)(x-y)
= y / 2(x+y)
參考: me
收錄日期: 2021-04-13 16:54:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091024000051KK00010