Quadratics
The videos below could help you with some of the skills you need to work with quadratics.
This video shows you how to factorise quadratics into double brackets. It starts at 4 minutes. Earlier in the video it shows you how to factorise to single brackets
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This video shows you how to solve quadratic equations by factorising
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This video is about completing the square
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This video is about factorising harder quadratics (where x squared has a coefficient greater than 1)
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