唔識做功課2
回答 (1)
2012-09-18 3:23 am
✔ 最佳答案
你想做d咩先-.-p^2-(p+q)^2
=-2pq-q^2
=q(-2p-q)
2-18(a+1)^2
=-2[9(a+1)^2-1]
=-2[3(a+1)-1][3(a+1)+1]
=-2(3a+2)(3a+4)
我估計係因式分解,
係咪呢D???
2012-09-17 19:26:28 補充：
16x^4-1
=(4x^2+1)(4x^2-1)
=(4x^2+1)(2x+1)(2x-1)
收錄日期: 2021-04-13 18:58:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120917000051KK00374