# Math Help - Polynomial investigation

1. ## Polynomial investigation

Investigate the solutions of a polynomail equation of the form az^3+bz+c=0 where at least one of teh solutions is not a real number (has i in it).
- abitrarily choose values for a,b,c
-all solutions must be present

2. ## Solution to cubic equation

Hello summna09
Originally Posted by summna09
Investigate the solutions of a polynomail equation of the form az^3+bz+c=0 where at least one of teh solutions is not a real number (has i in it).
- abitrarily choose values for a,b,c
-all solutions must be present
Have a look at this Cubic Formula -- from Wolfram MathWorld, especially from equation 15 onwards. I think it will give you the answer you need.