Quadratic Equation Calculator

import java.io.*;
import static java.lang.System.*;
import java.util.Scanner;
import java.lang.Math;

class Proj{

     public static void main (String str[]) throws IOException {


      double a;
      double b;
      double c;
      String response = null;
      Scanner scanner = new Scanner(System.in);

      System.out.println("Please enter a value for A");
      a = scanner.nextInt();
      System.out.println("Please enter a value for B");
      b = scanner.nextInt();
      System.out.println("Please enter a value for C");
      c = scanner.nextInt();

      double db = Math.pow(b,2);                                // B^2
      double eb = (4)*(a)*(c);                                  //discriminant

      double fb = Math.sqrt((db) - (eb));                       //inside sqrt

      double gb = (-b) + (fb);                                  // +
      double hb = (-b) - (fb);                                  // -

      double x1 = gb / (2*a);                                   //x sol w addition
      double x2 = hb / (2*a);                                   //x sol w subtraction

      if (Double.isNaN(fb)) {                                   //Checks for no real solutions
            System.out.println("No Real Solutions");
        }

       if(fb == 0) {                                            //Checks for 1 real solution
          System.out.println("One Real Solution");
          System.out.println("x = " + x1);

          System.out.println("Would you like to see a factored form?"); // Asks if you would like to see a factored form
          response = scanner.next();

          if (response.equalsIgnoreCase("Yes")) {               //Checks for if "yes" was said
          double x5 = (-x1);

          if(x5 > 0) {                                          // +
             System.out.println("(x + " + x5 + ")");
              }
         else {
             System.out.println("(x " + x5 + ")");              //-
         }
      }
          else {
              System.out.println("Okay");
          }
       }

    else if(fb > 0) {                                           //Checks for 2 solutions


        System.out.println("x = " + x1);                        //Displays  x1 value
     System.out.println("x = " + x2);                           //Displays  x2 value

     System.out.println("Would you like to see a factored form?"); // Asks if you would like to see a factored form
     response = scanner.next();

     if (response.equalsIgnoreCase("Yes")) {                    //Checks for if "yes" was said

         double x3 = (-x1);
         double x4 = (-x2);

         System.out.println("Factored form: ");                 //Displays Factored Form

         if(x3 > 0) {                                           // +
             System.out.println("(x + " + x3 + ")");
              }
         else {
             System.out.println("(x " + x3 + ")");
         }


         if(x4 > 0) {                                           // -
             System.out.println("(x + " + x4 + ")");
              }
         else {
             System.out.println("(x " + x4 + ")");
         }
     }

     else {                                                     // if something other than yes is said
            System.out.print("Okay.");
     }
    }

     }
    }