x^2
_______________________________________
|
x-3 | x^3 -6x^2 4x 15
| x^3 -3x^2
|__________________
0 -3x^2 4x
x^2 -3x -5
_______________________________________
|
x-3 | x^3 -6x^2 4x 15
| x^3 -3x^2
|__________________
0 -3x^2 4x
-3x^2 9x
_______________
0 -5x 15