更新1:
做步驟!!
F.2 Factorization!!!1題~~
回答 (2)
2011-10-30 4:08 am
✔ 最佳答案
(2+1)(x-y)-(3x+1)(x-y)=(x-y)[(2-1)-(3x+1)]
=(x-y)(3-3x-1)
=(x-y)(2-3x)
2011-10-29 6:21 pm
(2+1)(x-y)-(3x+1)(x-y)
=3(x-y) - (3x+1)(x-y)
=(x-y) [3-(3x+1)]
=(x-y) (2-3x)
=3(x-y) - (3x+1)(x-y)
=(x-y) [3-(3x+1)]
=(x-y) (2-3x)
參考: ME
收錄日期: 2021-04-26 16:51:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20111029000051KK00161