//code
# -*- coding:utf-8 -*-
import math

def quadratic(a, b, c):
    m = b * b - 4 * a * c
    m = math.sqrt(m)
    x1 = (-b + m) / (2 * a)
    x2 = (b + m) / (2 *a)
    return x1, x2

a = input('a:')
b = input('b:')
c = input('c:')
x1, x2 = quadratic(int(a), int(b), int(c))
print('x1 = %f, x2 = %f' %(x1, x2))