代码:

import math

a, b, c = map(float, input().split())
t:float = b**2 - 4 * a * c
if t < 0:
    print("No answer!")
x1:float = (-b + math.sqrt(t)) / (2 * a)
x2:float = (-b - math.sqrt(t)) / (2 * a)
if x1 == x2:
    print("x1=x2=", round(x1, 5), sep="")
else:
    print("x1=", round(x1, 5), ";x2=", round(x2, 5), sep="")

样例能过，测试时结果：