1.1 Quadratics

The materials in BLUE are the core lessons required to answer Paper 1 questions. If you study them, you can get A*.

The materials in RED are the additional lessons, the fun part such as formula derivation and alternative methods.

1. Intro: PDF

2. Solving equations using the quadratic formula: PDF, Video

3. Solving equations by factorizing: PDF, Video

4. Completing the square: PDF, Video

5. Inequalities: PDF, Video

6. Quadratic functions and discriminant: PDF, Video

7. Simultaneous equations: PDF, Video

8. Reducible to quadratics: PDF, Video

9. Derivation of the quadratic formula: PDF, Video

10. Topical past paper: PDF, Video, Questions only

11. Resources and references

• https://www.desmos.com/calculator

• https://www.symbolab.com/solver

• https://sciencing.com/everyday-examples-situations-apply-quadratic-equations-10200.html