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Rationalising the denominator — AQA GCSE Mathematics Definition | GradeGen

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Mathematics
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Rationalising the denominator

GCSE Mathematics · key term

Rationalising the denominator

Definition

Rewriting a fraction so that its denominator contains no surd while keeping its value unchanged.

Used by AQA

How each exam board covers it

AQA GCSE Mathematics · 8300

Specification N8 · Paper 1, Paper 2, Paper 3

This is achieved by rationalising the denominator.
Revise: Simplifying and Calculating with Surds

AQA Mathematics past papers

Related key terms

Coefficient
Conjugate
Like surd terms
Radicand
Surd

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