大大

點解你個問題好似有d問題
) z+ ~8 v  H: |# U4 }) r7 X

Originally posted by Triangel at 2007-4-18 01:26 PM:: {4 T: T( P& t. i
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
; v. T; u1 R7 w3 r7 M
9 z/ P" l  A8 [' H+ C

% @* _7 \3 a6 ]% F  N$ y. k
5 S/ |3 H0 t' u% \- f/ V[ Last edited by 大大 on 2007-4-18 at 01:54 PM ]

大大

Originally posted by littlenic at 2007-4-18 01:54 PM:
+ X( O; p( r+ b" }9 C* Y* s5 B% R4 W8 Q( c$ E8 H5 {+ B. _
' H, m% j5 u9 \3 ]) B
(x-x)= 0 ，所以答案係0，is it?

9 f. L6 N* S0 @* `9 k- J& C
- i4 \- H- U5 X+ G& _5 M. Q$ S, h, @) u6 g) \7 b, @
唔似a.math題
2 w6 i4 c  p. N似IQ題=.=1 R7 z+ I/ n1 u7 L2 M7 @, D& z# M

" i1 b1 t  x% K[ Last edited by 大大 on 2007-4-18 at 01:57 PM ]