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Standard form and the formula

Standard form and the formula

Some quadratics factorise, but many do not. The quadratic formula works for any quadratic equation, even when the answers are awkward decimals or surds.

Quadratic Formula Lesson

  1. GCSE
  2. /Maths
  3. /Quadratic Formula

Step-by-step lessons covering Edexcel GCSE Maths Quadratic Formula for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1, Paper 2 and Paper 3 format. Build fluency with number, ratio and algebra first, since geometry, probability and statistics topics rely on them, and leave extra time nearer the exam for Higher-tier problem-solving and multi-step reasoning questions.

Lessons

SurdsBoundsDirect and Inverse ProportionQuadratic FormulaFactorising Harder QuadraticsAlgebraic FractionsRearranging Harder FormulaeInverse and Composite FunctionsIterationFinding the Area of Any TriangleThe Sine RuleThe Cosine RuleCongruent Triangles3d Pythagoras and TrigonometryHistogramsConditional Probability