Антон Турчаков - Урок 1. Задание 6.

import math
a = float(input())
b = float(input())
c = float(input())
d = b ** 2 - (4 * a * c)
if d > 0:
    x1 = (-b + sqrt(d)) / (a * 2)
    x2 = (-b - sqrt(d)) / (a * 2)
    print("x1 = ", x1)
    print("x2 = ", x2)
elif d < 0:
    print("Нет решений")
else:
    x = -b / (2 * a)
    print('x = ', x)