F.2Maths (Factorization)
回答 (2)
2010-07-19 2:41 am
✔ 最佳答案
x^2+2xy+y^2+6(x+y)+9=(x+y)^2+6(x+y)+9=(x+y+3)^22010-07-18 18:57:52 補充：
因為呢度難打出黎
如果唔明點變的話
有張圖可以睇...
http://i31.tinypic.com/154d26t.jpg
參考: me
2010-07-19 3:52 am
x^2+2xy+y^2+6(x+y)+9
=(x+y)^2+6(x+y)+3^2
=(x+y+3)^2
=(x+y)^2+6(x+y)+3^2
=(x+y+3)^2
收錄日期: 2021-04-13 17:22:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100718000051KK01089