f.4 quadratic formula 2 (1q)

1)
x^2 - 2x + 4/3 = 0

Mutiply the equation by 3,

3x^2 - 6x + 4 = 0

delta

= 36 - 4(3)(4)

= 36 - 48

= -12 < 0

So, no real solutions.


2010-09-13 19:42:37 補充：
唔係呀!!!

根本呢一條式都無實數答案，

DELTA小於0，NO REAL SOLUTION....

你係唔係要complex number???

f.4 應該未學到

x^2 - 2x +4/3 = 0
3x^2 - 6x +4 = 0

x= [6±√36-4(3)(4)]/2(3)
x= 1± √3/3 i

:)
p.s. i = √-1