Quadratic Equation

using System;

class QuadraticEquation
{
    static void Main()
    {
        double a = 0;
        double b = 0;
        double c = 0;
        double x1 = 0;
        double x2 = 0;
        double x = 0;

        Console.WriteLine("Enter value for a:");
        a = double.Parse(Console.ReadLine());

        Console.WriteLine("Enter value for b:");
        b = double.Parse(Console.ReadLine());

        Console.WriteLine("Enter value for c:");
        c = double.Parse(Console.ReadLine());

        double rootPart = (b * b) - (4 * a * c);

        if (rootPart > 0)
        {
            x1 = (-b) - Math.Sqrt(rootPart) / 2 * a;
            x2 = (-b) + Math.Sqrt(rootPart) / 2 * a;
            Console.WriteLine(x1);
            Console.WriteLine(x2);
        }
        else if (rootPart < 0)
        {
            Console.WriteLine("No real roots");
        }
        else
        {
            x = (-b) - Math.Sqrt(rootPart) / 2 * a;
            Console.WriteLine(x);
        }
    }
}