Factorize 2x+4y+x^3+8y^3
吾該幫下手,,
[急]F.2 MATHS Factorize
2008-02-18 1:31 am
回答 (1)
2008-02-18 1:43 am
✔ 最佳答案
SOLUTION:2x+4y+x³+8y³
= (2x+4y) + (x³+8y³)
= 2 (x+2y) + [ x³+ (2y)³ ]
= 2 (x+2y) + (x+ 2y) (x²-2xy+4y²)
= (x+2y) (2+x²-2xy+4y²)
2008-02-17 17:47:19 補充：
樓上錯左應該係咁(a³ 十 b³) = (a 十 b) (a² - ab 十 b²)唔係咁(a³ 十 b³) = (a 十 b) (a² 十 ab 十 b²)
參考: ME
收錄日期: 2021-04-16 00:00:59
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080217000051KK03089