import java.util.Scanner;
 
public class KvadratnoeUravnenie {
 
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
double a, b, c, d;
double x1, x2;
System.out.println("Введите а: ");
a = in.nextDouble();
System.out.println("Введите b: ");
b = in.nextDouble();
System.out.println("Введите c: ");
c = in.nextDouble();
d = Math.pow(b, 2) - (4 * a * c);
if (d>0){
x1 = ((-1) * b + Math.sqrt(d)) / 2;
x2 = ((-1) * b - Math.sqrt(d)) / 2;
System.out.printf("x1 = " + x1 + " x2 = " + x2);
}
else if (d == 0){
x1 = (-1) * b;
System.out.printf("x1, x2 = " + x1);
}
else
System.out.print("Ошибка. D меньше нуля");
}
 
}