A brief PowerPoint demonstration about how we can derive the critical points of a quadratic equation from its different forms to sketch its graphs.
Complete the square - turning point (vertex)
Factorising - roots/solutions (where the graph crosses the x-axis
Expanded form - y intercept (where the graph crosses the y axis
Previous knowledge required:
- completing the square
- factorising double brackets
- solving quadratic equation from factorising
- translation of quadratic graphs
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