This below is an useful widget, which can be used for solving any quadratic equation. It is an easy to use calculator, you just need to type the parameters of your quadratic function and press the button below. As a result you will see the roots of the equation and some other useful information about it.
See the solutions here...
This is a cool online tool, but it can not draw the graph of the quadratic function. If you want to see the graph of your equation, visit our more advanced calculator HERE. This is a site all about quadratics, on which you can fing some other cool widgets and much more information. Some cool information about quadratics can be found on http://en.wikipedia.org/wiki/Quadratic_equation
Other Cool Math Sites
http://factoring-calculator.net - if you are interested in factoring polynomials, on this site you can find a calculator that can factor any expression. You don't believe this, just give a shot...