Cubic Equation Solver
Solve third-order polynomial equations of the form ax³ + bx² + cx + d = 0.
Σ The Formula
Real World Examples
# About This Calculator
A Cubic Equation is a polynomial equation of the third degree. Unlike quadratic equations, cubic equations always have at least one real root.
The general solution for cubic equations was first published by Gerolamo Cardano in 1545. It involves calculating a discriminant to determine the nature of the roots—whether they are all real or if some are complex (containing imaginary numbers).
How To Use
- Enter the coefficients **a**, **b**, **c**, and **d**.
- Note: The coefficient **a** cannot be zero (that would make it a quadratic).
- Click **Solve Cubic**.
- The results will display all real roots. Complex roots are noted but not solved for in this basic version.
Frequently Asked Questions
Why does it sometimes only show one root?+
Can I use decimals for coefficients?+
Is Cubic Equation Solver free to use?+
How accurate is Cubic Equation Solver?+
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Do you save my data?+
About
A Cubic Equation is a polynomial equation of the third degree. Unlike quadratic equations, cubic equations always have at least one real root.
The general solution for cubic equations was first published by Gerolamo Cardano in 1545. It involves calculating a discriminant to determine the nature of the roots—whether they are all real or if some are complex (containing imaginary numbers).