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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 covering Edexcel IGCSE Maths Expanding and Factorising for IGCSE Maths. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. 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

Compound Interest and DepreciationIndicesPrime Factors, HCF and LCMInequalitiesForming and Solving EquationsSequences (Nth Term)Expanding and FactorisingPythagorasAngles in PolygonsSurface AreaVolume of a PrismCylindersBearingsAverages from Frequency TablesProbability