QuadraticEquation

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _06.QuadraticEquation
{
    class QuadraticEquation
    {
        static void Main()
        {
            Console.Write("Enter first number: ");
            double a = double.Parse(Console.ReadLine());
            Console.Write("Enter second number: ");
            double b = double.Parse(Console.ReadLine());
            Console.Write("Enter third number: ");
            double c = double.Parse(Console.ReadLine());
            double discriminant = (b * b) - (4 * a * c);
            if (discriminant > 0)
            {
                double x1 = ((-b) - Math.Sqrt(discriminant)) / (2 * a);
                double x2 = ((-b) + Math.Sqrt(discriminant)) / (2 * a);
                Console.WriteLine("x1 = {0} ; x2 = {1}", x1, x2);
            }
            else if (discriminant == 0)
            {
                double x1Andx2 = ((-b) + Math.Sqrt(discriminant)) / (2 * a);
                Console.WriteLine("x1 = x2 = {0}", x1Andx2);
            }
            else if (discriminant < 0)
            {
                Console.WriteLine("No real roots.");
            }
        }
    }
}