import math

a = float(input("Give a: "))
b = float(input("Give b: "))

d = (a/2) ** 2 - b

if d > 0:
    x1 = - a / 2 + math.sqrt(d)
    x2 = - a / 2 - math.sqrt(d)
    print("x1 = ", x1)
    print("x2 = ", x2)
else:
    real = - a / 2
    imag = math.sqrt(-d)
    print("x12 = ", real, "+-", imag, "i")