using System;

public class Program

{

    public static void Main()

    {

        double a = double.Parse(Console.ReadLine());

        double b = double.Parse(Console.ReadLine());

        double c = double.Parse(Console.ReadLine());

        double D= b*b - 4*a*c;

        Console.WriteLine("D=" + D);

        double x1 = (-b + Math.Sqrt(D)/(2*a));

        double x2 = (-b - Math.Sqrt(D)/(2*a));

        Console.WriteLine("x1= " + x1);

        Console.WriteLine("x2= " + x2);

    }

}