# Algebra 2 - 2nd Edition

## Chapter 4: Solving Quadratic Equations That Have Complex Solutions

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

Please report broken links to Kathy Kral

### These links are for use with the entire chapter.

This page contains information of the history of quadratic equations.

This page contains an interactive tutorial on quadratic equations. Pass mouse over each colored area to reveal.

### 4.1 Solving Quadratic Equations by Graphing

http://www.teachertube.com/viewVideo.php?video_id=20844
This page contains a video on solving quadratic equation by graphing.

http://www.ronblond.com/M11/QFA.sf.APPLET/index.html
This page contains an applet for graphing quadratic equations and see the solution. This website requires Java to run some of its features.

### 4.2 Solving Quadratic Equations Using Square Roots

This page contains several quadratic equation solvers with step-by-step instructions, including one that uses the square root method.

### 4.3 Solving Quadratic Equations by Completing the Square

This page has a video lecture on completing the square and the quadratic formula.

http://www.mathsisfun.com/algebra/completing-square.html
This page explains the technique of "completing the square" to solve a quadratic, including practice problems.

This series of pages (Click Next) contains a tutorial on completing the square and shows how the quadratic formula is derived.

### 4.4 Solving Quadratic Equations by Factoring

http://www.regentsprep.org/regents/math/algtrig/ATE3/indexATE3.htm

This series of pages contains a detailed review of solving quadratic equations by factoring.