import math
a =float(input("Please enter a: "))
b =float(input("Please enter b: "))
c =float(input("Please enter c: "))
d = b**2-4*a*c
if a == 0: 
    if b == 0 and c != 0:
        print("No solutions")
    if b == 0 and c == 0:
        print("x belong to real numbers set")
    if b != 0 and c != 0:
        print(-c/b)
elif d<0 :
    print('No solution found')
elif d==0:
    x = -b/(2*a)
    print(x)
else:
    x1 = (-b + math.sqrt(d))/(2*a)
    x2 = (-b - math.sqrt(d))/(2*a)
    print(x1, x2)