1. -6 + 2√2
2. -6 - 2√2
3. 6 + 2√2
4. 6 - 2√2
收錄日期: 2021-05-01 13:16:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100711222007AAr2RqU