x²-1=0
4x²-4x+1=0
x²+4x+3=0
x²+7x-18=0
幫幫我吧 我十分急的!!!!!!!!
F4解方程 請教教我吧!
2009-10-02 7:00 am
回答 (2)
2009-10-02 8:15 am
x2-1=0
x2=1
x=1 或 x=-1
4x2-4x+1=0
(2x-1)2=0
2x-1=0
x=1/2(二重根)
x2+4x+3=0
(x+3)(x+1)=0
x=-3 或 x=-1
x2+7x-18=0
(x+9)(x-2)=0
x=-9 或 x=2
x2=1
x=1 或 x=-1
4x2-4x+1=0
(2x-1)2=0
2x-1=0
x=1/2(二重根)
x2+4x+3=0
(x+3)(x+1)=0
x=-3 或 x=-1
x2+7x-18=0
(x+9)(x-2)=0
x=-9 或 x=2
2009-10-02 7:10 am
(x+1)(x-1)
(x-1/2)(x-1/2)
(x+3)(x+1)
(x-2)(x+9)
2009-10-01 23:13:01 補充：
4(x-1/2)(x-1/2)
冇計錯既應該岩
(x-1/2)(x-1/2)
(x+3)(x+1)
(x-2)(x+9)
2009-10-01 23:13:01 補充：
4(x-1/2)(x-1/2)
冇計錯既應該岩
參考: myself
收錄日期: 2021-04-23 20:39:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091001000051KK02084