ay-by-a-b
=y(a-b)-(a+b)
=y(a-b)-a-b
可唔可以=(a-b)(y-1)??(因式分解)
又係數學.....(高手教下小弟)
2007-01-06 11:16 pm
回答 (6)
2007-01-06 11:31 pm
✔ 最佳答案
唔可以y(a-b)-(a+b)唔等於(a-b)(y-1)
ps 但係y(a-b)-(a-b)就可以等於(a-b)(y-1)
有括號即代表你視括號裡面既野為一舊野,就好似(a+b)咁
如果無括號既就即係你視佢地為兩舊野,就好似-a-b 係兩舊野相減
做因式分解之前一定要確保前後因式相同先可以分解
2007-01-09 3:56 am
.............(suppr man in the earth!!!!!!)
2007-01-07 12:59 am
唔可以唔可以
2007-01-06 11:24 pm
NO.
(a-b)(y-1)
=ay-a-by+b
=ay-by-a+b
(a-b)(y-1)
=ay-a-by+b
=ay-by-a+b
2007-01-06 11:21 pm
=A (AY-BY)=AB - (A-B)=O
收錄日期: 2021-04-12 17:49:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070106000051KK02467