### Categories

### RSS Feed

### Search NewtonExcelBach

### Archives

### Top Posts

- Time in hours and minutes between two dates
- Commenting a block of code in VBA
- Solving Quadratic, Cubic, Quartic and higher order equations; examples
- Using Linest for non-linear curve fitting, examples, hints and warnings
- Weighted Least Squares Regression, using Excel, VBA, Alglib and Python
- Using LINEST for non-linear curve fitting
- Using Goal Seek on Multiple Cells
- Contour plots with Excel and Matplotlib
- Brent's Method; Update and Examples
- Cubic Splines

### Recent Comments

mindOnion on Drawing a Buckyball in Ex… dougaj4 on Drawing a Buckyball in Ex… mindOnion on Drawing a Buckyball in Ex… mindOnion on Drawing in Excel 7 – Cre… Veronica Davenport on Asymmetric Catenary Function py_UMom spreadsheet… on More on combined shear and ben… Skip on xlwings – dataframes and… dougaj4 on xlwings – dataframes and… More on combined she… on RC Design Functions 9.03; comp… skip on xlwings – dataframes and… skip on mpmath for Excel dougaj4 on mpmath for Excel skip on mpmath for Excel dougaj4 on Composite Beam Spreadsheet Upd… metroxx on Composite Beam Spreadsheet Upd…

# Tag Archives: Cubic

## 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
Tagged Cubic, Excel, Higher order polynomials, Jenkins-Traub, Python, Quadratic, Quartic, solving polynomials, UDF, VBA
13 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
Tagged complex numbers, Cubic, Excel, high order polynomials, Jenkins-Traub Method, Polynomial, Python, PyXLL, Quadratic, Quartic, UDF, VBA
5 Comments

## Polynomial Update

Following a comment here: Solving cubic and quartic equations with Excel the Quartic and CubicC User Defined Functions (UDFs) have been amended to fix a problem occurring with some combinations of coefficients. The updated spreadsheet (including full open source code) can be … Continue reading

Posted in Excel, Maths, Newton, UDFs, VBA
Tagged Cubic, Evaluate polynomial, Excel, Jenkins-Traub, Quartic, Solve polynomial, UDF, VBA
12 Comments

## Daily Download 19: Solving polynomials

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
Tagged Cubic, Evaluate polynomial, Excel, Jenkins-Traub, Quadratic, Quartic, Solve polynomial, UDF, VBA
1 Comment

## Complex Numbers and Solving Quartic Polynomial Equations

It was recently pointed out to me that the User Defined Function (UDF) for solving quartic polynomial equations presented in this post returned an error for some input values. In tracking down the source of the error I decided that it … Continue reading

Posted in AlgLib, Excel, Maths, Newton, UDFs, VBA
Tagged complex numbers, Cubic, Excel, Polynomial, Quartic, UDF, VBA
2 Comments