# Algebra 1 - 4th Edition

## Chapter 8: Quadratic Equations and Functions

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

### This site applies to the entire chapter.

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

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

This series of pages discusses how to graph and interpret graphs of quadratic equations.

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

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

### 8.3 Solving a Quadratic Equation by Factoring

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

### 8.4 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.

### 8.5 The Zeros of a Quadratic Equation

This series of pages shows how to identify and find the zeros or roots of quadratic equations. It uses some material covered in your next lesson.

### 8.7 Systems that Include Quadratics

NEW This site describes and provides practice for solving systems of equations that include both a linear and a quadratic equation.

http://www.regentsprep.org/Regents/math/algtrig/ATE5/indexATE5.htm
NEW This site describes and provides practice for solving systems of equations that include both a linear and a quadratic equation.