//Sample07_132.java
class Sample07_132 {
  static double[] method_04(double a, double b, double c){
      double[] ans = {(2*a) , -b ,  (b*b-4*a*c)};
      return ans;
  }
  static void printAnswer(double[] ans){
      double partA = ans[0];
      double partB = ans[1];
      double partC = ans[2];

      System.out.println("          " + partB + "  +/-sqrt( "+ partC +" )");
      System.out.println("    x = -------------------------");
      System.out.println("                " + partA);
  }
    public static void main(String[] args){
      int[][] coefficient ={
          {1,-2,-1},
          {1,4,1},
          {1,-6,1},
          {1,10,13},
          {2,-4,-8},
          {3,6,-6},
          {1,-5,5},
          {1,1,-3},
          {2,-8,1},
          {2,12,7},
          {1,-2,-5},
          {3,24,39},
          {3,-8,3},
          {8,24,13},
          {5,-10,3},
          {7,4,-1}

        };
        for(int i=0; i<coefficient.length; i++){
          int[] line = coefficient[i];
          int a = line[0];
          int b = line[1];
          int c = line[2];

          System.out.println(
              (i+1) + ". " + (int)a + "xx+" + (int)b +"x+" +(int)c +"=0"
          );

          double[] ans = method_04(a, b, c);
          printAnswer(ans);
       }
    }
}