# Tag Archives: Quadratic

## Solving Quadratic, Cubic, Quartic and higher order equations; examples

A previous post presented a spreadsheet with functions for solving cubic and quartic equations, and this has been extended with another function solving higher order polynomials.  The functions are actually very easy to use, but the documentation in the spreadsheets is quite brief, … Continue reading

Posted in Arrays, Excel, Link to Python, Maths, Newton, UDFs, VBA | | 12 Comments

## Python for VBA users – 5; Using built in numpy functions

Previous Python Post In previous posts in this series I have looked at translating VBA functions to solve quadratic and cubic equations, but the Python numpy library has a polyroots function that will solve polynomials of any degree, and will … Continue reading

Posted in Arrays, Excel, Link to Python, Maths, Newton, NumPy and SciPy, UDFs, VBA | | 5 Comments

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 … Continue reading

Posted in Excel, Maths, Newton, UDFs, VBA | | 1 Comment

## Solving cubic and quartic equations with Excel

Although in earlier posts (such as this one) I have referred to some User Defined Functions (UDFs)  for solving cubic and quartic equations, I just realised recently that I haven’t actually talked about them here, and since they are in … Continue reading

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , | 24 Comments

## Linking Excel to Fortran – 2

In this post the procedures described for C++ here will be replicated for Fortran: The spreadsheet, fortran source code, and compiled dll described in this code may be downloaded from Cubic.zip As always, it is better to use the downloaded code, … Continue reading

Posted in Excel, Fortran, Link to dll, Maths, UDFs, Uncategorized, VBA | Tagged , , , , , | 23 Comments