a,b,c=map(int,input().split())
if a!=0:
    delta=(b**2)-(4*a*c)
    if delta<0:
        print('phuong trinh vo nghiem')
    elif delta==0:
        print(-b/(2*a))
    else:
        print((-b+delta**0.5)/(2*a),(-b-delta**0.5)/(2*a))
else:
    print(-c/b)

from math import *
a, b, c = int(input()), int(input()), int(input())
delta = b*b - 4*a*c;
if(a == 0):
    print("Khong phai phuong trinh bac hai")
elif delta < 0:
    print("Phuong trinh vo nghiem")
elif delta == 0:
    print("Phuong trinh co nghiem kep")
    print(f"x1 = x2 = {float(-b/2*a)}")
else:
    print("Phuong trinh co hai nghiem phan biet")
    print(f"x1 = {float((-b + sqrt(delta))/2*a)}")
    print(f"x2 = {float((-b - sqrt(delta))/2*a)}")

$#khanhtaon$