3. Quadratics

3.01 Examples of Factorising Quadratics

3.02 Introducing y = x^2

3.03 Sketch the Graph of y = x^2 + 4x - 21

3.04 Sketch the Graph of y = x^2 - 4x + 4

3.05 Examples of Completing the Square when a = 1

3.06 Examples of Completing the Square when a is not equal to 1

3.07 Sketch the Graph of y = x^2 + 4x - 21 AGAIN

3.08 Sketching Quadratics in Completed Square Form

3.09 Where the Quadratic Formula Comes From (challenge)

3.10 Using the Quadratic Formula

3.11 Sketching y = x^2 - 6x + 7 using the Quadratic Formula

3.12 Sketching y = 3x^2 - 5x + 4 - when the Quadratic Formula Fails

3.13 Introducing the Discriminant

3.14 Using the Discriminant to find How Many Roots a Quadratic has

3.15 Introducing Hidden Quadratics / Quadratics in Disguise

3.16 Examples of Solving Hidden Quadratics / Quadratics in Disguise