1.3x^2+6x-28=0
2.x^2-16X=28=0
更新1:
係+呀...sor
係+呀...sor
收錄日期: 2021-04-23 17:17:21
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070910000051KK03026