5:28 GCSE Maths - How to Rationalise the Denominator of a Surd (Part 3/3) (2026/27 exams)
Crisp GCSE walkthrough covering one- and two-term denominators, including the conjugate method with practice.
Rationalise a denominator using the conjugate
Rationalise a denominator using the conjugate
5 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.
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14:32 Rationalising the Denominator - GCSE Higher Maths
Thorough Higher-tier lesson building up to conjugate denominators with worked exam-style examples.
7:44 Rationalising Denominators - Corbettmaths
Corbettmaths explains rationalising two-term denominators using the conjugate, clear and exam-focused.
4:01 Rationalizing Denominators with Conjugates
Khan Academy shows the conjugate trick to clear surds from a two-term denominator.
19:38 Surds Rationalising the Denominator
Maths Genie's detailed GCSE tutorial working through rationalising including conjugate denominators.