引用:
Originally posted by *°雲尼斯杜萊 at 2005-10-1 04:08 PM:
我都有野ng識ar~!
1.Solve 4x-20x+25=0
2.Solve(2x-3)-1=0
3.By using quadratic formula,solve x-2x-1=0 (to 2 d.p.)
4.If 4x+3x+k=0 has no real roots,find the range of k
5.If 2x+kx+(k-2 ...
呢個都ng知岩ng岩ga...錯左ng好怪我....(你話1-3識...甘我ng打la...)
5.If 2x+kx+(k-2)=0 has equal root,find the value of k
2x+kx+(k-2)=0
3+ 1.5 k + k-2=0 (proved in (2))<..括號果d可以ng寫...
1-2.5k=0
2.5k = -1
k=-1/2.5
=-0.4....
ng知岩ng岩ga
7(a)
x+x-12=0
2x-12=0
2x=12
x=6...
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Last edited by because on 0505-10-1 at 04:31 PM ]