Figuring Out the Discriminant

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Author: Seth Marx

Description:

To be able to easily identify the discriminant when looking at the quadratic formula, and to understand how we use the discriminant to find the number of real solutions to a quadratic equation.

This packet will go over where to find the discriminant and how to use it to find the number of solutions.

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Tutorial

Discriminant

Discriminant: The part of the quadratic formula under the square root (radical) sign.. b²- 4ac..

THE DISCRIMINANT ONLY TELLS US THE NUMBER OF SOLUTIONS... NOT WHAT THE ANSWERS ARE

Use this site for more assistance:

www.mathwarehouse.com/quadratic/discriminant-in-quadratic-equation.php

Interpreting the Discriminant

This video will explain the importance of the discriminant and how to use it to find the number of solutions.

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Graphs

Watch the video first before looking at these graphs. These are the graphs of the 2 sample problems in the video.

Source: www.geogebra.org

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