Solve Quadratics Graphically
Maths: Edexcel A Level Pure Maths, topic 2.2.5
Solving Quadratics - Graphically
We can solve quadratic equations using graphs. This is useful when we can't work out the exact answer so need to estimate.
Example
- Roots of a quadratic are the x values where the graph crosses the x axis.
- The solutions for the graph shown are at +2 and -2.
Test yourself on Solve Quadratics Graphically
What are the solutions to this quadratic?
Where are the roots (or solutions) to a quadratic drawn on a graph?