A nice explanation of how to solve cubic equations in general | A minimum of blind calculation
Equation Solver: Wolfram|Alpha
Depressed Cubic – GeoGebra
4 Ways to Solve a Cubic Equation - wikiHow
SOLVED:(a) Use a calculator to verify that the value x=cos20^∘ is a root of the cubic equation 8 x^3-6 x-1=0. (b) Use the identity cos3 θ=4 cos^3 θ-3 cosθ(from Example 3 in
How to Solve Cubic Equation in Calculator I Casio fx991MS I The calculator King - YouTube
math - C# Mathematics Calculation not working properly - Stack Overflow
Discriminant Calculator Online, Step by Step Explanation
Solving cubic and quartic equations (and some words on quintics) | A minimum of blind calculation