Quadratic

class Quadratic {
public static void main(String[] args)
{
int a = 2;
int b = 20;
int c = 6;
double x1 = 0;
double x2 = 0;
double D = (b * b) - (4 * a * c);
if (D > 0) {
x1 = (int) (-b + Math.sqrt(D)) / (2 * a);
x2 = (int) (-b - Math.sqrt(D)) / (2 * a);
System.out.println("x1 = " + x1 + "; x2 = " + x2);
}
else if (D == 0) {
x1 = (int) (-b) / (2 * a);
System.out.println("x1 = " + x1);
}
else if (D < 0) {
System.out.println("Уравнение не имеет корней! D < 0!");
}
}
}