求解这样为什么不能过
import math
def quadratic_equation(a, b, c):
if a == 0:
return -(c/b)
else:
x1=(-b + math.sqrt( b * b - 4 * a * c ))/ 2 * a
x2=(-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)
返回了(0.0, -6.0)
(5.0, 1.0)
