按照这个代码,为什么结果出不来啊
>>> import math
>>> def quadratic_equation(a, b, c):
... t = math.sqrt(b * b - 4 * a * c)
... return (-b + t) / (2 * a),( -b - t )/ (2 * a)
... print quadratic_equation(2, 3, 0)
... print quadratic_equation(1, -6, 5)
>>>
>>>
>>>
>>>
>>>
一直回车,出不来答案