//Sample06_01.java

import java.io.File;

class Sample06_01 {

  static int[] primeNums = {2, 3, 5, 7, 11, 13};

  static double[] method_04(double a, double b, double c){
      double[] ans = {(2*a) , -b ,  (b*b-4*a*c)};
      return ans;
  }
  static double[] reduce(double[] ans){
      for(int i=0; i< primeNums.length; i++){
          if(ans[0] >= primeNums[i]){
            while(
              ans[0]%primeNums[i] == 0 &&
              ans[1]%primeNums[i] == 0 &&
              ans[2]%(primeNums[i]*primeNums[i]) == 0
              ){
                ans[0]/=primeNums[i];
                ans[1]/=primeNums[i];
                ans[2]/=(primeNums[i]*primeNums[i]);
            }
          }
      }
      return ans;
  }
  static void printAnswer(double[] ans){
      double partA = ans[0];
      double partB = ans[1];
      double partC = ans[2];

      System.out.println("          " + partB + "  ±√( "+ partC +" )");
      System.out.println("    x = -------------------------");
      System.out.println("                " + partA);
  }
  public static void main(String[] args){

      File file = new File("q1_axx_bx_c_0.csv");
      int[][] coefficient = ReadFile_03.toIntArray2D(file, "UTF-8", ",");

      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);

          ans = reduce(ans);

          printAnswer(ans);
     }
  }
}