1)a^2+b^2+2bc-2ca-2ab
2)2x^2+xy-y^2+3x-3y-2
3)x^2-4y^2-x+6y-2
Factorisation
2011-04-09 3:41 am
回答 (1)
2011-04-09 4:18 am
收錄日期: 2021-04-23 20:45:18
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20110408000051KK00790