## Before You Watch

This video shows how to factorise certain algebraic expressions and how to use them.

It builds upon a basic understanding of:

• algebra
• how to use and expand brackets
• indices in algebra.

These concepts are explained in the Introduction to Algebra and Indices Laws.

If you're not confident in the above areas, watch these two videos first, to make sure you have the background knowledge needed, then come back.

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## Now What?

The method presented here is the simplest method of factorisation – identifying a common factor. Two other methods often used are factorisation by grouping, and the difference of two squares. Factorisation is a valuable skill and it's useful to also become familiar with these other methods. Further resources are provided in the Other Links section.

Once you are confident with factorisation using the method covered in this video, you can examine other algebraic skills, such as Algebraic Fractions or Linear Equations.