Worked examples When asked to solve a quadratic equation, we are really finding the roots – where the parabola cuts the x-axis, therefore when we have the graph drawn, it is very easy to do this.

Revise how to recognise and determine the equation of a quadratic function from its graph. BBC Bitesize Scotland revision for SQA National 5 Maths.

The graph of a quadratic equation forms a parabola. The technique of graphing as it is practiced today is based on the work of René Descartes. (Image credit: Robert Coolman) ...