quadratic equation ..finding roots using graphical method….reference text books

We can solve a quadratic equation by using the graphical method.

Compared to the other methods, the graphical method only gives an estimate to the solution(s).

If the graph of the quadratic function crosses the x-axis at two points then we have two solutions. If the graph touches the x-axis at one point then we have one solution. If the graph does not intersect with the x-axis then the equation has no real solution.

The following diagrams show the three types of solutions that a quadratic equation can have: two solutions, one solution and no real solution.