星月乂光輝

引用:

原帖由 獅子暴風壁 於 2012-1-31 20:00 發表
3-5i      x^2+px+q=0

(3-5i)^2+p(3-5i) +q =0
(9-30i+25i^2)+3p-5pi+q =0
(9-30i+25(-1))+3p-5pi+q =0
(-16+3p+q)-(30+5p)i=0

-16+3p+q=0 ------ (1)
-(30+5p)=0 -------(2)

(2): -(30+5p)=0
-30-5p=0
p=-6

s ...

i can tell you , you"re wrong !