Technology

How can graphing technology be used to approximate the solutions of a quadratic equation?

1.How can graphing technology be used to approximate the solutions of a quadratic equation? 2.Why would graphing technology be used to approximate the solutions of a quadratic equation?

Public Comments

1. 1) If you're looking for the solutions to a quadratic equation, then you are interested in the values of x that make y = 0. So when you graph the quadratic, you can approximate the roots by looking where the quadratic curve crosses y = 0. It could be two places, one place, or no places. 2) Sometimes an approximation is sufficient depending on the application. Sometimes if you have a lot of them, all you want to know is if the curve crosses y = 0 or not.