using System;

using Microsoft.VisualStudio.TestTools.UnitTesting;

​

public class QuadraticEquationsSolver

{

    public static double[] Solve (double a, double b, double c)  

    {     

        var discriminant = b * b - 4 * a * c;   

        var x1 = ( - b - Math.Sqrt(discriminant))/(2 * a);  

        var x2 = ( - b - Math.Sqrt(discriminant))/(2 * a);  

        return new double[] {x1, x2};  

    } 

}

​

public class Program

{

    public static void Main(string[] args)

    {       

        var a = 1;

        var b = -3;

        var c = 2;  

        var result = QuadraticEquationsSolver.Solve(a, b, c);

        Console.WriteLine("x1 = {0}, x2 = {1}", result[0], result[1]);

    }

}

​