a = float(input())
b = float(input())
c = float(input())
d = b-(4*a*c)
if a==0:
    print('x=',-c/b)
if b==0:
    print('x=',(-c/a)*0.5)
if c==0:
    print('any x')
else:
    print('Error')
if a!=0 and b!=0 and c!=0:
  if d > 0:
    print('x=',((-b+(d*0.5))/2*a),((-b-(d*0.5))/2*a)
  if d < 0:
    print('Error')
  if d==0:
    print('x=',-b/2*a)