 # Algebra - 3rd Edition

## Chapter 11: Quadratic Equations

Some links are repeated for use with more than one lesson.

Please report broken links to Kathy Kral

### This site applies to the entire chapter.

This site defines a quadratic function and a quadratic equation and shows examples of each.

### 11.1 Graphing Quadratic Equations

This page contains a slide show with audio that explains how to graph quadratic equations.

NEW An illustrated tutorial on graphing quadratic equations, including how to interpret and use the general quadratic form.

### 11.2 The Quadratic Function

http://www.explorelearning.com/index.cfm?method=cResource.dspResourcesForCourse&CourseID=245
This site contains gizmos that show the quadratic function and inequalities.

This site shows how to find the sign of a quadratic function.

### 11.3 Solving a Quadratic Equation by Factoring

This site contains notes on solving quadratic equations by factoring and includes examples and practice problems.

This page contains an explanation of how to solve quadratic equations using factoring by solving examples.

### 11.4 Completing the Square

This page contains a video tutorial with notes covering completing the square.

http://www.mathsisfun.com/algebra/completing-square.html
This site contains description on how to complete the square with several examples on different cases of problems.