[{"metadata":{"trusted":true,"scrolled":true},"cell_type":"code","source":"import math\n    \ndef quadratic(a, b, c): # ax**2+bx+c=0\n \n    if a == 0:\n        \n        return x == -c/b\n    \n    elif (b**2)-(4*a*c) >= 0:\n        \n        d = (b**2)-(4*a*c)\n        \n        e = math.sqrt(d)\n        \n        x1 = (-b-e)/(2*a)\n        x2 = (-b+e)/(2*a)\n        \n        return x1,x2\n    else:\n        print('无解')\n\na = quadratic(1, 9, 3)\n\nprint(a)","execution_count":24,"outputs":[{"output_type":"stream","text":"(-8.653311931459037, -0.34668806854096257)\n","name":"stdout"}]}]

import math

def quadratic(a, b, c): # ax**2+bx+c=0

    if a == 0:

        return x == -c/b

    elif (b**2)-(4*a*c) >= 0:

        d = (b**2)-(4*a*c)

        e = math.sqrt(d)

        x1 = (-b-e)/(2*a)

        x2 = (-b+e)/(2*a)

        return x1,x2

    else:

        print('无解')

a = quadratic(1, 9, 3)

print(a)