import java.util.Scanner;
public class Quadratic4 {
  public static void main (String[] Args) {
    System.out.println("Solving quadratic equations Ax^2 + Bx + C");
    System.out.println("Enter real numbers A, B, C");
    Scanner getInput = new Scanner(System.in);
    double A = getInput.nextDouble();
    double B = getInput.nextDouble();
    double C = getInput.nextDouble();
    double discriminant = B*B - 4.0*A*C;
    double ans;
    if (A == 0) {
      System.out.println("A linear equation; only one root");
      ans = -C/B;
      System.out.println("The one root is " + ans);
    } else if (discriminant < 0) {
      System.out.println("No (real) roots");
    } else if (discriminant == 0) {
      System.out.println("One (double) root");
      ans = -B/(2*A);
      System.out.println("The double root is/are " + ans);
    } else {			// discriminant > 0
      double ans1 = (-B + Math.pow(discriminant,0.5))/(2.0*A);
      double ans2 = (-B - Math.pow(discriminant,0.5))/(2.0*A);
      System.out.println("The roots are " + ans1 + " and " + ans2);
    }
  }
}
// Local Variables:
// compile-command: "javac Quadratic4.java"
// c-basic-offset: 2
// End: