Bhaskara

using System;
using UnityEngine;
using UnityEngine.UI;

public class Bhaskara : MonoBehaviour {

    public Text textA, textB, textC, textResults;

    public void Calculate() {
        try {
            var a = float.Parse(textA.text);
            var b = float.Parse(textB.text);
            var c = float.Parse(textC.text);
            var delta = Mathf.Pow(b, 2f) - 4f * a * c;
            var result1 = -b + Mathf.Sqrt(delta) / 2f * a;
            var result2 = -b - Mathf.Sqrt(delta) / 2f * a;
            textA.text = "x1= " + result1 + "\nx2= " + result2;
        }
        catch(DivideByZeroException) {
            textResults.text = "Cannot divide by zero";
        }
        catch {
            textResults.text = "Error";
        }
    }
}