Mathematical Methods · Unit 1 · Surds and quadratic functions · Surds

Understand the concept of a surd as an irrational number represented using a square root or a radical sign.

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Simplify square roots of natural numbers which contain perfect square factors, e.g. √45 = √9 × 5 = √9√5 = 3√5
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Use the four operations to simplify surds, e.g. √5 − 2√5 + 4√5 = 3√5 and 2√3 × 5√11 = 10√33
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