更新1:
雖要步驟,thx
Maths
回答 (2)
2010-01-02 8:27 pm
✔ 最佳答案
-5d-2e+f+4d-3f-6e= -5d+4d-2e-6e+f-3f
= -d-8e-2f
2010-01-02 8:42 pm
-5d-2e+f+4d-3f-6e
= (-5d+4d)+(f-3f)+(-2e-6e)
= -d-2f-8e
= (-5d+4d)+(f-3f)+(-2e-6e)
= -d-2f-8e
收錄日期: 2021-04-25 17:01:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100102000051KK00537