What's the square root of nine?
回答 (12)
2009-05-02 6:57 am
✔ 最佳答案
3 
2009-05-02 6:54 am
√ 9 = ± 3
2009-05-02 7:03 am
3 or -3
2009-05-02 6:59 am
+3
2009-05-02 6:54 am
3
2009-05-02 6:53 am
3
2016-05-25 10:48 pm
9
2009-05-02 7:05 am
√9
= √(3^2)
= 3
NB: some people wrote ±3 (+/-3) which was wrong, √9 ONLY equals 3 because √ is "principal square root" which the square root is positive.
= √(3^2)
= 3
NB: some people wrote ±3 (+/-3) which was wrong, √9 ONLY equals 3 because √ is "principal square root" which the square root is positive.
參考: Square Root
http://en.wikipedia.org/wiki/Square_root
2009-05-02 6:58 am
+-3, though if you are in basic algebra they are probably looking for |3|
參考: A calculator, basic math skills, personal experience
收錄日期: 2021-05-01 12:24:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090501225002AAjN5mU