~~~

a,b,c = map(float,input().split())
if a == 0 or b2 - 4ac < 0:
print(“Impossivel calcular”)
else:
x1 = (-b + ((b 2) - (4 * a * c))0.5)/2/a
x2 = (-b - ((b 2) - (4 * a * c))**0.5)/2/a
print(“R1 = %.5lf”%x1)
print(“R2 = %.5lf”%x2)

~~~