## Solving a Cubic Equation by a general formula |

At this web page you are able to solve a cubic equation. A cubic equation or an equation of the third degree can be described by the following general expression: F(X) = AX ^{3} + BX^{2} + CX + DX is an unknown real or complex number. F(X) is a function of X. May also have the symbol 'Y'. A, B, C and D are all real numbers of constants. If you set F(X) = 0, the cubic equation can be solved. ExampleX ^{3} + X^{2} - X - 1 = 0This equation has got three real roots: X _{1} = -1,X _{2} = -1 and X_{3} = 1.I've drawn the graph of F(X) = X ^{3} + X^{2} - X - 1, [-2,2]:AX ^{3} + BX^{2} + CX + D = 0CalculationInput the values of A, B, C and D. To start the calculation please press the button. Algebra |