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. In other cases then coefficient is absent, enter 0. To enter negative coefficients use minus sign, for example -45. At the present calculator doesn't support decimal numbers as inputs.

∙ x3 + ∙ x2 + ∙ x + = 0