import math
def disp_roots(a, b, c):
delta = b ** 2 - 4 * a * c
if delta >= 0:
x1 = (-b + math.sqrt(delta)) / (2 * a)
x2 = (-b - math.sqrt(delta)) / (2 * a)
print(f'x1 = {x1}, x2 = {x2}')
else:
print('kök yok')
disp_roots(1, 0, -4)