√21*√3 = ?
回答 (7)
2016-07-17 9:17 pm
✔ 最佳答案
√21 × √3= √(3 × 7) × √3
= √3 × √7 × √3
= √3 × √3 × √7
= (√3)² × √7
= 3√7
2016-07-18 7:23 am
√63 =√9 x √7 = 3√7
2016-07-18 12:08 am
sqrt(21) * sqrt(3) = sqrt(3 * 7) * sqrt(3) = 3 sqrt(7).
2016-07-17 9:23 pm
√21 √3 = √63 = 3 √7
2016-07-17 9:22 pm
√3 * √21 =
√3 * √3 * √7 =
3√7
√3 * √3 * √7 =
3√7
2016-07-17 9:19 pm
√21*√3= √63
2016-07-17 9:15 pm
sqrt(21 * 3)
Which can be simplified since 21*3 contains a factor of 9 = 3^2. And what is the square root of 3^2?
Which can be simplified since 21*3 contains a factor of 9 = 3^2. And what is the square root of 3^2?
收錄日期: 2021-04-18 15:16:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160717131429AAm2MVp