
Originally posted by Triangel at 2007-4-18 01:26 PM:
(x - a) (x - b) (x – c) = x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
Originally posted by 大大 at 2007-4-18 01:41 PM:
咁難既=.="
[ Last edited by 大大 on 2007-4-18 at 01:52 PM ]
Originally posted by Triangel at 2007-4-18 01:26 PM:
第一個答中有獎
(x - ...
Originally posted by littlenic at 2007-4-18 01:54 PM:+ Z) }: O( j6 f
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(x-x)= 0 ,所以答案係0,is it?

Originally posted by littlenic at 2007-4-18 01:54 PM:6 R7 T3 e) a! ?$ q9 q: k6 |/ Z. D
Z+ m0 C/ ]; L9 j f) l! Y& x$ o
(x-x)= 0 ,所以答案係0,is it?

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5 t& I. ?, J8 Q8 z# m! E1 G- x! I

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