# how to solve this cubic equation...

• January 30th 2009, 03:37 AM
chemtoli
how to solve this cubic equation...
x^3-x^2+(a-b-b^2)x-ab=0

please guys I need to solve this equation step by step. Thanks
• January 30th 2009, 04:44 AM
qzno
are you solving for the variables or are you trying to factor or simplify?
• January 30th 2009, 06:19 AM
red_dog
Isn't it $x^3-x^2+(a+b-b^2)x-ab=0$?
• March 28th 2009, 03:50 AM
chemtoli
How to solev this Cubic Equation
I need to solve this equation step by step by variable x.

x^3-x^2+(A-B-B^2)*x-A*B=0

You can find this equation on:

https://www.e-education.psu.edu/png520/m10_p5.html
• March 28th 2009, 04:17 AM
CaptainBlack
Quote:

Originally Posted by chemtoli
I need to solve this equation step by step by variable x.

x^3-x^2+(A-B-B^2)*x-A*B=0

You can find this equation on:

https://www.e-education.psu.edu/png520/m10_p5.html

By inspection x=-B is a root, and then factorisation and the quadratic formula will give the other roots.

CB