maths
回答 (1)
2007-09-08 6:36 am
✔ 最佳答案
15(y^2+1) = 34y15y^2 +15 = 34y
15^2 - 34y +15 = 0
(5y-3) (3y-5) =0
Therefore either 5y-3=0 or 3y-5=0
5y=3 or 3y=5
y= 3/5 or y=5/3
收錄日期: 2021-04-24 09:25:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070907000051KK03927