f2數學--公式(10marks)急~~~

2007-12-30 12:15 am
1.化簡: x^2-xy+3x-3y/2x^2+2xy+6x+6y

2.化簡: (2x+1/2x-1)-(1+x/2-4x)

3. 找出(a-b)(a+b), a^2+ab 及a-b 的L.C.M.

4. 如果u=4, f=2.4, 找出v
(1/u^2)+(1/3v)=1/4f

5.已知x/3=(1/p+3q)-(x/3p)
把公式的主項變換為q
更新1:

唔該寫埋過程....

回答 (3)

2007-12-30 1:58 am
✔ 最佳答案
1. 解:原式=(x-y)(x+3)/2(x+3)(x+y)=(x-y)/2(x+y)
2. 解:原式=2(2x+1)+(x+1) / 2(2x-1)=5x+3/2(2x-1)
3. 解:L.C.M. = a(a-b)(a+b)
4. 解:v = 48/21
5. 解:q = x(p-3) / 9p

2008-01-04 22:04:42 補充:
我想話……d重要過程都打晒la......
參考: me
2007-12-30 1:00 am
1. (x-y)/2(x+y)

2. (5x+3)/2(2x-1)

3. a(a-b)(a+b)

4. v = 8

5. -[3-x(1+p)]/3p
參考: d答案唔肯定因為全部都亂撞既
2007-12-30 12:27 am
1:78::::157:::4464:::117137:4113471
參考: www.yochuna.com


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