大大

點解你個問題好似有d問題' w+ Y4 O% W# U% q

Originally posted by Triangel at 2007-4-18 01:26 PM:8 u2 n5 F, A! k% _2 H
(x - a) (x - b) (x – c) =  x^3 – ax^2 – bx^2 – cx^2 – abx + acx + bcx - abc
1 Z) ^6 B; c4 c. W+ \: C
- m1 V) B9 M3 J6 c! K

5 m+ D" e* P( r4 O1 n
8 w* c. W  H1 h5 m0 a$ R[ 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:8 f# [/ P% o/ h: U: R% g0 ]

& S+ \# g8 G7 N7 h4 g+ }# y& \1 R  o0 B) E  w& S! y
(x-x)= 0 ，所以答案係0，is it?

/ Q+ j( R1 T; w" Z! F

5 |, a* g8 w4 a* x. y- l- W; ~7 v
- ^1 A: g0 ~1 h9 g唔似a.math題
! s) \) D2 C* J( U% I  T; i似IQ題=.=
/ C3 C4 L6 a" i; i% u( D6 m0 f* v  K4 k$ b5 T; _2 T0 a0 i
[ Last edited by 大大 on 2007-4-18 at 01:57 PM ]