Question 44075
The method for solving cubic equations is very long. refer to http://www.sosmath.com/algebra/factor/fac11/fac11.html
for an explanation and examples 
I hope this helps 
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk