using System;

​

namespace QuadraticEquationApp

{

    public class QuadraticEquation

    {

        public decimal A { get; set; }

        public decimal B { get; set; }

        public decimal C { get; set; }

​

        private const string Template = "{0}x^2+{1}x+{2}=0";

​

        public QuadraticEquation(decimal a, decimal b, decimal c)

        {

            if (a == 0)

                throw new ArgumentOutOfRangeException("Коэффициент А не может быть 0");

​

            A = a;

            B = b;

            C = c;

        }

​

        public override string ToString()

        {

            return $"Коэффициент А: {A}" +

                $"\nКоэффициент B: {B}" +

                $"\nКоэффициент C: {C}" +

                $"\nУровнение: {GetEquation()}\n";

        }

​

        public string GetEquation()

        {

            return string.Format(Template, A, B, C);

        }

    }

​

    public class Program

    {

        static void Main(string[] args)

        {

​

            Console.WriteLine(new QuadraticEquation(1, 1, 56));

            Console.WriteLine(new QuadraticEquation(1, 12, 5));

            Console.WriteLine(new QuadraticEquation(-10, 1, 6));

        }

    }

}