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Factorising expressions : HCF types

Always start factorising expressions by finding a highest common factor (HCF) if it exists between all terms. If not it may be possible to factorise by grouping as the following videos demonstrate.

What is factorising?

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Highest common factor (HCF)

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Factorising by grouping

Sometimes when there is no common factor, by grouping several of the terms together it is possible to factorise an expression.

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