Solve cubic equation online

Cubic equation is equation of the form:

a∙x3 + b∙x2 + c∙x + d = 0

Presented online calculator solves cubic equations using Cardano formulae. However, in special cases (then one or more coefficients are equal to zero, or there is some dependence between coefficients, ect.) more simple solution is used.

Numbers, fractions and even parameters can be entered as coefficients. The leading coefficient can't be zero. The equation entered into calculator in its natural form. To enter the decimal numbers, use point as the integer and decimal parts separator, for instance 1.45.

Choose expression input type:

Expression input type:

Choose cubic equation variable:

Equation variable

Кубическое уравнение

Cubic equation you want to solve:

Other usefull links:

Quadratic equation online calculator
Linear equation online calculator