lab3

import java.util.Scanner;
class Lab3{
    public static void main(String [] args){

            Scanner sc = new Scanner(System.in);
            int x,x2,x3;
            double result,result2,result3;

            System.out.println("Please enter the value of x");
            x = sc.nextInt();

            x2=x-1;
            x3=x+1;

            result = (x*x*x-4*(x+20))/2.0;
            result2= (x2*x2*x2-4*(x2+20))/2.0;
            result3= (x3*x3*x3-4*(x3+20))/2.0;

            System.out.println("F("+x+") = " + result);
            System.out.println("F("+x2+") = " + result2);
            System.out.println("F("+x3+") = " + result3);

            System.out.print("Thanks for using my program :)");
        }
}