Roots of quadratics 2 – Smart Notebook – Follows up with some examples and an exam question as a plenary.
Investigate roots – Excel – Experiment with different values to find a link between the sums and products.
Roots of quadratics 1 – Powerpoint – Proving results from experiment followed by worked example
Roots of quadratics matching activity – PDF- Excellent activity produced by Susan Wall. Could be used in a revision lesson..
The videos below are by Jack Brown.