Wednesday, 16 December 2009

Algebra: Surds

Surds are numbers left in 'square root form' (or 'cube root form' etc). They are therefore irrational numbers. The reason we leave them as surds is because in decimal form they would go on forever and so this is a very clumsy way of writing them. (See here for notes and examples )

Skills needed to answer GCSE questions
  • Using Surds in calculations
  • Simplifing Surds
  • Rationalise Surds (which needs you to remember the difference of 2 squares)

    Helpful resources, examples and links


    BBC Bitesize is always good

    GCSE Maths tutor - technical but some worksheets and videos

    Some people fing watching a YouTube video can help, but be aware that they use real Maths teachers

    MyMaths Surds1 goes through the topics in a gentle way.
    Surds2 - a little harder

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