//Sample07_123.java
class Sample07_123 {

    static double[] method_03(double a, double b, double c){
        double x1 = (-b + Math.sqrt(b*b-4*a*c)) / (2*a);
        double x2 = (-b - Math.sqrt(b*b-4*a*c)) / (2*a);
        double[] ans = {x1 , x2};
				return ans;
    }

    public static void main(String[] args){
        int a=2;
        int b=3;
        int c=-4;
        System.out.println(
            (int)a + "xx+" + (int)b +"x+" +(int)c +"=0"
        );

        double[] ans = method_03(a, b, c);
        System.out.println(""+ ans[0] + " and " + ans[1]);
    }
}