public static double getRoot1(double a, double b, double c) {
            double root1;
            String s = "No Real Solution";
            if((b*b) - 4*a*c < 0) {
              throw new IllegalArgumentException(s);
            }
            else {
                root1 = (-b + Math.sqrt((b*b) - 4*a*c))/ (2*a);
            }
            return root1;

        }
        public static double getRoot2(double a, double b, double c) {
              double root2;
            String s = "No Real Solution";
            if((b*b) - 4*a*c < 0) {
              throw new IllegalArgumentException(s);
            }
            else {
                 root2 = (-b - Math.sqrt((b*b) - 4*a*c))/ (2*a);
            }

            return root2;
        }