1. Quadratic equation is a knowledge unit in mathematics. Knowing how to solve a quadratic equation is an essential skill that any student needs to have. In learning and doing exercises, it is useful to have a tool to test, check or even find the solution of a quadratic equation. It is also useful to have a tool to draw graph interactively.

2. This application is a useful tool for both high school students and teachers. It can be used as an aid tool in learning and teaching in classroom. Students even can use it in their's self-learning process.

3. This application is a brief introduction to quadratic equation. It consists of three sections: a brief theoretical review; a quadratic equation solver; and an interactive graph.

4. The application is compatible for both iphone and iPad. The iPad version has full features. The iphone version is a brief version, it will be updated with full features in the next version.

5. Any comment are welcome. All comments will be taken into account for the next versions.