Unit 17 - Quadratic Functions

Unit Objectives
Prior Knowledge:

• Expand pairs of brackets (Video 18.01)
• Factorise using linear factors (Video 18.02)
• Factorise quadratics (Video 18.03 cross method) (Video 18.04 split middle term) 
• Factorise: difference of two squares (Video 18.05)
• Factorise four-term expressions eg. ax + ay + 3x + 3y (Video 18.06)
• Solve quadratic equations by factorizing (Video 18.07) (Video 18.08) (Activities)
• Solve quadratic equations using a GDC
• Solve quadratic equations using the quadratic formula (formula given) (Video 18.09) (Video 18.10) (Activities)

Extended IGCSE learning objectives. Students should be able to:

• Know that y = a(x-h)^2 + k is a parabola with vertex of (h, k) (Video 18.11) (Video 18.12)
• Find a quadratic function given
  • Vertex and another point (Video 18.13)
  • x-intercepts and a point (Video 18.14)
  • vertex or x-intercepts with  a = 1

Lesson Resources​

0. Quadratic Functions Work Booklet

Quadratic Functions Booklet

Examples Complete

1. Quadratic Basics

Lesson

2. Root Form Of A Quadratic

Lesson

3. Vertex Form Of A Quadratic

Lesson

4. Mixed Quadratics

Lesson

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