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Expanding and Factorising
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Key ideas

Key ideas

Area model of one rectangle with height k and widths a and b split into areas ka and kb to show k(a + b) = ka + kb

Expanding removes brackets by multiplying the outside factor by every term inside. Factorising is the reverse process, where you rewrite a sum as a product with brackets.

Expanding and Factorising Lesson

  1. IGCSE
  2. /Maths
  3. /Expanding and Factorising

Step-by-step lessons on Edexcel IGCSE Maths Expanding and Factorising. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons