import math
a = int(input("а = "))
b = int(input("b = "))
c = int(input("c = "))
D = b**2 - 4 * a * c
print ("D =", b**2,"- 4 *", a,"*",c)
print (D)
d = math.sqrt(int(input("Введите D = "))
print (D)
x1 = (-b + d) / 2 * a
x2 = (-b - d) / 2 * a
print ("x1 =", x1)
print ("x2 =", x2)