Solving Cubic Equations
In this section we will learn how to solve cubic equations. Note that the procedure of factorising cubic polynomials is dealt with here.
This video from the maths support centre SUMS at NUI Galway explains how to solve a cubic equation by factorising the cubic polynomial.
Note: All SUMS NUIG content is available for free at www.nuigalway.ie/public-sites/s-u-m-s .
The following notes from MathCentre are a resource for cubic polynomials and cubic equations:
- Introduction to cubic expressions and roots (Pages 1-4)
- How to solve cubic equations (Pages 5-10)
- Graphical interpretation of cubic expressions (Pages 10-11)
Note: a particular type of procedure called ''synthetic division’' is used to factorise the cubic polynomial here.
Try the exercises in the notes to test your knowledge of solving cubic equations.
A pdf of this document can be downloaded here.