x^2 - 3
----------------------------------------
( x - 2 ) (x^3 - 2x^2 - 3x + 6 )
x^3 - 2x^2
- +
-------------------------------
- 3x + 6
- 3x + 6
+ -
-------------------
0
( x^3 - 2x^2 - 3x + 6) = ( x - 2)(x^2 - 3) = ( x - 2)( x - sqrt3)(x + sqrt3)
x - 2 = 0 or x - sqrt3 = 0 or x + sqrt3 = 0
x = 2 x = sqrt3 x = - sqrt3