title: Quadratic Formula Program Java?
body: <p>Im writing a program, that takes the a, b, and c from an equation, and uses them to find x using the formula:
  <a href="http://www.purplemath.com/modules/quads/qform01.gif" rel="nofollow">http://www.purplemath.com/modules/quads/qform01.gif</a>.</p>
  
  <p>The problem im getting, is that when I plugin the equation 1x^2 +3x +4 I get x = -Infinity and x = infinity instead of x = 1 and x = -4.</p>
  
  <p>Heres my code:</p>
  
  <p>Class 1:</p>
  
  <pre><code>    public class quadratictest
      {
          public static void main(String args[])
          {
              DecimalFormat df = new DecimalFormat("#.###");
              System.out.println("--------------------------------------------------");
              System.out.println("               ~Quadratic Formula~");
              System.out.println("--------------------------------------------------");
              System.out.println("in a polynomial, there are 3 important numbers used");
              System.out.println("to figure out x. they are a, b, and c, shown below.\n");
              System.out.println("\t\t1x^2 +3x +4");
              System.out.println("\t\t^     ^   ^");
              System.out.println("\t\ta     b   c");
      Scanner input = new Scanner(System.in);
             System.out.print("\nPlease type a, b, and c here[a b c]: ");
              int a = input.nextInt();
              int b = input.nextInt();
              int c = input.nextInt();
              mathey quad = new quadsong(a,b,c);
          System.out.println("------------");
          System.out.println(quad.solveb());
          System.out.println(quad.solvea());
          //System.out.println("x =" +df.format(quad.solvea()));
          //System.out.println("x =" +df.format(quad.solveb()));
          System.out.println("------------");
      }
  }
  </code></pre>
  
  <p>Class 2:</p>
  
  <pre><code>    import java.util.*;
      import java.io.*;
      import java.text.DecimalFormat;
              /**
       * Write a description of class quadsong here.
       * 
       * @author (your name) 
       * @version (a version number or a date)
       */
      public class mathey
      {
          int a;int b;int c;
          double solution1;
          double solution2;
            public mathey(int aN, int bN, int cN)
          {
              int a  = aN;
              int b = bN;
              int c = cN;
              solvea();
              solveb();
          }
          public double solvea()
          {
           solution1 = ( (b*-1) + Math.sqrt((b^2)-(4*a*c)))/(a+a);
            if (solution1 == Math.floor(solution1))
           {
           return solution1;
          }
          else
          {
              return 0;
          }
          }
              public double solveb()
          {
           solution2 = ( (b*-1) - Math.sqrt((b^2)-(4*a*c)))/(2*a);
           if (solution2 == Math.floor(solution2))
           {
           return solution2;
          }
          else
          {
              return 0;
          }
          }
      }
  </code></pre>
  
  <p>heres my output:</p>
  
  <pre><code>    --------------------------------------------------
                     ~Quadratic Formula~
      --------------------------------------------------
      in a polynomial, there are 3 important numbers used
      to figure out x. they are a, b, and c, shown below.
  
              1x^2 +3x +4
              ^     ^   ^
              a     b   c
  
      Please type a, b, and c here[a b c]: 1 3 4
      ------------
      x =Infinity
      x =-Infinity
      ------------
  </code></pre>
  
  <p>Whats going wrong? Thanks in advance!
  P.S Sorry for the code formatting, idk why its not working like I want on here haha</p>