请问哪里错了呢？

import math

def quadratic_equation(a, b, c):

x1 = (-b + math.sqrt(b*b - 4*a*c)) / (2*a)

x1 = (-b - math.sqrt(b*b - 4*a*c)) / (2*a)

return x1,x2

print quadratic_equation(2, 3, 0)

print quadratic_equation(1, -6, 5)

sfxy

2017-06-09

源自：初识Python 7-3

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3 回答

慕用4662770
2017-06-10

def square_of_sum(L):
    i = 0
    sum = 0
    while i < len[L]:
        i = i + 1
        sum = sum + L[i]**2
    return sum

print square_of_sum([1, 2, 3, 4, 5])
print square_of_sum([-5, 0, 5, 15, 25])

请问遮掩这样子为什么错了