This is the best quadratic equation solver app! Here you can:

1 - Solve any quadratic equation, even when a, b and c values are negative or have decimal points.

2 - Get quadratic equation step-by-step solution, even when it involves complex numbers.

3 - Determine parabola concavity

4 - Obtain parabola's inflection point

You can buy Pro version inside the app. It does not show ads and also allows you to work offline.