using System;

public class Program

{

    public static void Main()

    {

        Double a,b,c,d,x1,x2;

        while (true)

        {

        Console.WriteLine("Ingresa 3 numeros");

        a= Convert.ToDouble(Console.ReadLine()); 

        b= Convert.ToDouble(Console.ReadLine());

        c= Convert.ToDouble(Console.ReadLine());

        d= Math.Pow(b,2)- 4*a*c;

        if (d<0)

        {

            Console.WriteLine("Error");

        }

        else if ((d==0))

        {

            d= -b/(2*a);

        }

        else if (d>0)

        {

            x1= (-b + d)/(2*a);

            x2= (-b +d)/(2*a);

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

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

        }

​

        }

    }

}

​