6:17 GCSE Maths - What is Difference of Two Squares (DOTS) (2026/27 exams)
Clear UK walkthrough of the DOTS method with six worked factorising examples and a check by expanding.
Difference of two squares
Use the difference of two squares to factorise
4 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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3:03 Difference between two squares - Corbettmaths
Corbettmaths teaches how to factorise a difference of two squares quickly and clearly.
6:21 The Maths Prof: Factorising Quadratics (the difference of 2 squares)
The Maths Prof explains factorising the difference of two squares with friendly step-by-step examples.
19:35 How To Factor Difference of Squares - Algebra
Thorough factorising practice including harder cases with coefficients and multiple variables.