Today’s download provides analytic solutions to polynomial equations up to fourth order (that is quadratic, cubic and quartic equations) and an iterative method to solve equations of higher order. All these functions are found in the download file:

http://interactiveds.com.au/software/Polynomial.zip

The links below describe these functions in more detail. Several of the earlier links refer to other download files, but all of the functions are now included in the Polynomial.xlsb spreadsheet.

Solving cubic and quartic equations with Excel

Evaluating Polynomial Functions

Complex Numbers and Solving Quartic Polynomial Equations

Solving higher order polynomials

Evaluating higher order polynomials …

Polynomial Update

EvalPoly Function

Quadratic, Cubic, CubicC and Quartic functions

RPolyJT function used to solve a 60th order polynomial

Bottom of the input and output for the same function

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Thanks very much, it´s very useful. From Spain.

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