This android app will allow you to solve quadratic equations. In this project uses free icons from here: https://www.flaticon.com/. This app uses great lib for display math equations: https://github.com/jianzhongli/MathView. For draw equation diagram uses this lib: https://github.com/jjoe64/GraphView.
You can see this app in Google play store: https://play.google.com/store/apps/details?id=com.vkochenkov.equationsolver.
© Created by Kochenkov Vladislav