Transcription of Cubic equations - mathcentre.ac.uk
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Cubic equations - mathcentre.ac.uk
Cubic equationsmc-TY-cubicequations-2009-1A Cubic equation has the formax3+bx2+cx+d= 0wherea6= 0 All Cubic equations have either one real root, or three real roots. In this unit we explore why thisis we look at how Cubic equations can be solved by spotting factors and using a method calledsynthetic division. Finally we will see how graphs can help us locate order to master the techniques explained here it is vital that you undertake plenty of practiceexercises so that they become second reading this text, and/or viewing the video tutorial on this topic, you should be able to: explain why Cubic equations possess either one real root or three real roots use synthetic division to locate roots when one root is known find approximate solutions by drawing a equations and the nature of their Cubic graphs to solve Cubic mathcentre 20091.
Using graphs to solve cubic equations 10 www.mathcentre.ac.uk 1 c mathcentre 2009. 1. Introduction In this unit we explain what is meant by a cubic equation and how such an equation can be solved. The general strategy for solving a cubic equation is to reduce it to a quadratic equation,
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