(根號x) + [根號(x+7)] = 7
find x
find x = ?
2008-02-03 8:44 pm
回答 (3)
2008-02-03 9:50 pm
✔ 最佳答案
√x+ √(x+7)=7√x=7- √(x+7)
x=49-14 √(x+7)+(x+7)
-56=-14( √x+7)
4=√(x+7)
16=x+7
x=9
2008-02-05 6:37 am
x = 9
收錄日期: 2021-04-23 20:32:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080203000051KK01111