Quadratic Equations
If you want to learn more then see the following links
http://zookeepersblog.wordpress.com/aieee-quadratic-equations/
http://zookeepersblog.wordpress.com/iit-jee-quadratic-theory-of-equations/
http://zookeepersblog.wordpress.com/aieee-quadratic-equations/
http://zookeepersblog.wordpress.com/iit-jee-quadratic-theory-of-equations/