using System;

public class Program

{

    public static void Main()

    {

            int x;

            Console.WriteLine("Enter a value for x:");

            x = int.Parse(Console.ReadLine());

            if ( x * x * x * x + x * x * x - 7 * x * x - x + 6 == 0)

            {

                Console.WriteLine($"The vaule {x} Is  a root of the  equation");

            }

            else

            {

                Console.WriteLine($"The value {x} IS NOT a root of the equation") ;

            }

            Console.ReadKey();

    }

}