Python3 代码

import math

n = input().split()

a = float(n[0])
b = float(n[1])
c = float(n[2])

d = b*b - 4*a*c

if not a or d < 0:
    print ("Impossivel calcular")
else:
    a *=2
    r1 = (-b + math.sqrt(d))/a
    r2 = (-b - math.sqrt(d))/a
    print ("R1 =", f'{r1:.5f}')
    print ("R2 =", f'{r2:.5f}')