A lesson on factorising quadratic expressions using a grid approach (the Milligan method), where factor pairs of the first and last terms are multiplied across to find the middle term. Worked examples include quadratics where the coefficient of x² is greater than 1 and show what to do when a pair of factors does not work.
What this presentation covers
- always look for a common factor first
- the grid (Milligan) method
- factor pairs of the first and last terms
- multiplying across to check the middle term
- quadratics with a coefficient of x² greater than 1
- what to do when the factors do not work
Level: GCSE
Slides: 8
Format: PowerPoint (.pptx)
Contributed by: Dianne Wager