x^2+ 7x − 3 = 0
x^2 + 7x − 2 = 0
4x^2 − 4x + 15 = 0
2x^2− 5x + 2 = 0
更新1:
我想有埋過程呀..thx!!
好簡單ge方程式
2009-04-14 8:01 pm
Solve the following quadratic equations by completing the square.
x^2+ 7x − 3 = 0
x^2 + 7x − 2 = 0
4x^2 − 4x + 15 = 0
2x^2− 5x + 2 = 0
x^2+ 7x − 3 = 0
x^2 + 7x − 2 = 0
4x^2 − 4x + 15 = 0
2x^2− 5x + 2 = 0
回答 (2)
2009-04-14 11:37 pm
✔ 最佳答案
圖片參考：http://g.imagehost.org/0730/ScreenHunter_01_Apr_14_15_34.gif
∴The equation is no real root.
2x2− 5x + 2 = 0
(2x-1)(x-2)=0
x=1/2或x=2
2009-04-14 15:37:43 補充：
x=1/2 or x=2
2009-04-14 15:39:18 補充：
或=or
2009-04-14 8:40 pm
thanks!!!但係我想問可5可以show埋過程呀?
收錄日期: 2021-04-23 20:40:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090414000051KK00618