factorize
3y^2-20+7y
&
(a+b)^2-3(ab+b^2)
factorize 3y^2-20+7y & (a+b)^2-3(ab+b^2)
2008-06-14 2:32 am
回答 (1)
2008-06-14 2:38 am
✔ 最佳答案
3y^2-20+7y=3y^2 + 7y - 20
=(3y - 5)(y + 4)
(a+b)^2-3(ab+b^2)
=(a + b)(a + b) - 3b(a + b)
=(a + b)[(a + b) - 3b]
=(a + b)(a - 2b)
收錄日期: 2021-04-13 15:42:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080613000051KK01904