# Dirty cubics

1. Nov 23, 2008

### NoobixCube

Hey,
I have a cubic of this form:
$$\\ax^{3}-bx-c=0\\$$
how do I solve for $$x$$?

2. Nov 23, 2008

### NoobixCube

It may pay to add that a,b,c are greater than zero...

3. Nov 23, 2008

### HallsofIvy

Staff Emeritus
That looks like a reduced cubic to me and for general a, b, c, the solution is given by Cardano's cubic formula:
http://mathworld.wolfram.com/CubicFormula.html