Quadratic Equation Solver

一个简单的APL解决二次方程（分解，判别，顶点）

An simple Apl to solve quadratic equation with the following features:

- Discriminant formula

- Factorization

- Vertex formula

- Result for single, real and complex solution.

- There is an ads, if there is an internet connection.

- Share via some apl that support sending text data (e.g Facebook, Email, BBM, SMS dll).

Please be noted: Some apl do not allow other apl to send text data automatically (e.g Facebook), for this case, after the screen of apl show up, tab and hold, then click Paste button to paste text data manually.