這題 根式問題化簡下列各式?
回答 (1)
2016-01-05 1:37 am
(2√6+√2)(√6-2√2)
= (2√6)(√6) - (2√6)(2√2) + (√2)(√6) - (√2)(2√2)
= 12 - 4√12 + √12 - 4
= 8 - 3√12
= 8 - 6√3
(√6-√2)²
= (√6)(√6) - 2(√6)(√2) + (√2)(√2)
= 6 - 2√12 + 2
= 8 - 2√12
= 8 - 4√3
= (2√6)(√6) - (2√6)(2√2) + (√2)(√6) - (√2)(2√2)
= 12 - 4√12 + √12 - 4
= 8 - 3√12
= 8 - 6√3
(√6-√2)²
= (√6)(√6) - 2(√6)(√2) + (√2)(√2)
= 6 - 2√12 + 2
= 8 - 2√12
= 8 - 4√3
收錄日期: 2021-04-18 14:17:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160104161319AA4LiOK