1.http://s59.radikal.ru/i166/1011/11/e8e066ce7616.jpg
已知AB//EF,求x
--------------------------------------------------------------
因式分解
1.10x^2 - 22xy + 4y^2
2.39m^2 - 82mn +8n^2
平行線上的角(1條)&因式分解(2條)
2010-11-24 8:48 pm
回答 (2)
2010-11-24 11:49 pm
✔ 最佳答案
-------------------------------------------------------------------------------------------------------------圖片參考：http://img543.imageshack.us/img543/6125/angle.png
2010-11-24 15:52:14 補充：
http://img543.imageshack.us/img543/6125/angle.png
2010-11-24 15:57:06 補充：
2. another solutions =(82-74)/78 = 8/78 =4/39
(x-4/39)=(39x-4)
in terms of m & n =(39m-4n)
2010-11-24 9:28 pm
[130-(x+25)]=[120-(2x-30)]
130-x-25=120-2x+30
x=120+30-130+25
=45?
10x^2 - 22xy + 4y^2
=2(5x^2-11xy+2y^2)
=2(5x-y)(x-2y)
130-x-25=120-2x+30
x=120+30-130+25
=45?
10x^2 - 22xy + 4y^2
=2(5x^2-11xy+2y^2)
=2(5x-y)(x-2y)
收錄日期: 2021-04-23 22:53:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101124000051KK00420