Expanding, factorising, completing the square, the quadratic formula and the discriminant

What this note covers

1. Recognising and expanding quadratic expressions
2. Factorising monic and non-monic quadratics
3. Solving by factors and the null factor law
4. Completing the square
5. The quadratic formula and exact roots
6. The discriminant and choosing a method

6 sections · 10 key terms & formulas · 6 common mistakes