Factorising Quadratic Expressions
On this page you will find several videos on factorising quadratic expressions. It is highly recommended that you work through them in the order they are on this page.
Multiply to make the number
Add to make the x 
+ + means both positive
+  means bigger positive, smaller negative   means bigger negative, smaller positive  + means both negative 

This first video in the series on factorising quadratic expressions demonstrates the basic principle of using two brackets to factorise a quadratic.


In this second video we extend the method to consider quadratics that have a number multiplying the x squared term.


This third video looks at even more complex quadratic expressions, where there are multiple choices for every stage of the process.

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