1. (14a-4c)(14a+4c)=?
2.(9a+8d)(9a-8d)=?
3.(13x+7b)(13x-7b)=?
4.(4+5d)(5d-4)=?
收錄日期: 2021-04-13 14:45:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070312000051KK02178