9-И-2 ex.5

# -*- coding: utf-8 -*-
"""
Created on Sat Nov 21 17:06:32 2020

@author: Sergey
"""

a,b,c=float(input()),float(input()),float(input())
D=(b**2)-4*a*c
if D>0:
    print('x1 =',(-b+(D**(1/2)))/(2*a))
    print('x2 =',(-b-(D**(1/2)))/(2*a))
elif D==0:
    print('x =', (-b)/(2*a))
else:
    print('Нет действительных корней')