(展開)1.(3a+1)(a-2)
(展開)2.(3b(2次方)-2b+1)(b-1)
(展開)3.(2x(2次方)-3x+1)(x(2次方)--x-1)
收錄日期: 2021-04-23 22:07:07
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070717000051KK00697