奇怪的是代码全写在一行就错了 这样就可以了
import math
def quadratic_equation(a, b, c):
x1 = (-b + math.sqrt(b*b - 4*a*c))
x1 /= (2*a)
x2 = (-b - math.sqrt(b*b - 4*a*c))
x2 /= (2*a)
return x1,x2
print quadratic_equation(2, 3, 0)
print quadratic_equation(1, -6, 5)
