You can use this app the calculate the roots (y = 0) and vertex (top) of any quadratic equation.
The app has a very user-friendly interface that allows you to enter your quadratic equation.
The app shows all formulas used to calculate the coordinates of the roots and the vertex.
You can also graph the equation.
https://andro.io/app/quadraticequationsolver-1a4yi
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Quadratic Equation Solver for Android – Latest Version & Features
by Electronial
★★★★★
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> 2.2k
Monthly Downloads
~$900
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