How do I solve a cubic or quartic equation?
(Copyright © 2000-2001 --
this item revised 8 June 2001)
- Dr. Math FAQ item
- Roots of the Cubic Equation
by Howard McAllister
(just the formulas, in a nice format for printing)
- Analytical Solution of a Cubic Equation
part of a thesis by Andy Delano, after Patel
(an unusual presentation involving trig functions)
- Cubic and Quartic Equations
by Fred Worth
- A New Approach to Solving the Cubic
by R.W.D. Nickalls
(an approach based in analytic geometry and the properties of the
graph of the cubic)