E A PROGRAMME TO FND THE VALUE OF X BY QUARDIC FORMULA USING METHODS:

INPUT:

using System;

using System.Collections.Generic;

using System.Text;

namespace a

{

    class quadraticformula

    {

        double squareofb(double b)

        {

            double value = b * b;

            return value;

        }

        double x1(double a, double b, double c)

        {

            double ac4=4*a*c;

            double b1 =Math.Sqrt(squareofb(b)-ac4);

            double x = ((-b+b1 )/(2*a));

            return x;

        }

        double x2(double a, double b, double c)

        {

            double ac4=4*a*c;

            double b1= Math.Sqrt(squareofb(b)-ac4);

            double x =((-b-b1)/(2*a));

            return x;

        }

        static void Main(string[] args)

        {

            double a, b, c;

            Console.WriteLine("plz input the value of a");

            a = Convert.ToDouble(Console.ReadLine());

            Console.WriteLine("plz input the value of b");

            b = Convert.ToDouble(Console.ReadLine());

            Console.WriteLine("plz input the value of c");

            c = Convert.ToDouble(Console.ReadLine());

            quadraticformula q = new quadraticformula();

            Console.WriteLine("x1={0}", q.x1(a,b,c));

            Console.WriteLine("x2={0}", q.x2(a, b, c));

        }

    }

}

OUTPUT: