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public static void main(String[] args) {
double a = 1D;
double b = 6D;
double c = 25D;
double e = b * b - 4 * a * c;
if (e < 0) {
System.out.println(-b/(2*a) + " + " + Math.sqrt(-e)/(2*a)+"i");
System.out.println(-b/(2*a) + " - " + Math.sqrt(-e)/(2*a)+"i");
} else {
System.out.println((-b + Math.sqrt(e)) / (2 * a));
System.out.println((-b - Math.sqrt(e)) / (2 * a));
}
}