(a2 + a)2 – 2(a2 + a) – 3
更新1:
sor... is.. (a^2+a^2)-2(a^2+a)-3 =????
about f.5 maths
回答 (2)
2010-01-09 4:17 am
✔ 最佳答案
(a2+a)2-2(a2+a)-3=[(a2+a)-3][(a2+a)+1]
=(a2+a-3)(a2+a+1)
2010-01-11 11:38 am
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http://rapidshare.de/files/48964318/HKCEE_Topic_5_-_Chemical_Cell_and_Electrolysis.pdf.html
Free Mock paper:
http://rapidshare.de/files/48975066/Mock_Exam_Paper_for_HKCEE_Chemistry_2010_by_G.Tsang.pdf.html
Answer key:
http://rapidshare.de/files/48975088/Answer_Key_for_Mock_Exam_Paper_for_HKCEE_Chemistry_2010_by_G.Tsang.pdf.html
1月31號將會有個按考試規格進行的mock exam for HKCEE chemistry 2010 + 批改(免費,絕無花巧), 有興趣的同學可致電以下專補化學的補習社(tel no.: 2392-1213)
網址: www.elementclc.com
收錄日期: 2021-04-23 20:43:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100107000051KK00701