What are surds?

3 years ago

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Kole Donnelly

1 Answer

David B Verified Sherpa Tutor ✓

GCSE / National 5 Maths, Edexcel, AQA, SQA. Qualified Head of Maths

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Surds are the square root of a number that cannot be simplified further. They are irrational and if written in decimal form, would go on forever.

The square root of 9, is 3, so this is not a surd, however the square root of 3, cannot be written simpler, so is a surd.

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