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Cubic Root Calculator  

This calculator computes complex and real roots for any cubic polynomial. It applies the LinBairstow algorithm which iteratively solves for the roots starting from random guesses for a solution. The calculator is designed to solve for the roots of a cubic polynomial with the form: x^{3} + a·x^{2} + b·x + c = 0 The program is operated by entering the coefficients for the cubic polynomial to be solved, selecting the rounding option desired, and then pressing the Calculate button. All entries are cleared by pressing the Clear button. If the value of c is zero (which means that one root is zero), the program returns an error message: cannot solve In this case, the cubic polynomial can be reduced to a quadratic which is easily solved. It is possible for the initial random guesses used by the algorithm to cause it to be unstable; the above error message will result in this instance. Each time the algorithm is started, a new set of initial random guesses will be generated  another trial may result in a solution


© 2012 Colin Allchin Click here for disclaimer and other information 