7-4等于3啊。還好我小學畢業了不然都回答不上來

e=(-b+sqrt(b*b-4*a*c))/a/2
f=(-b-sqrt(b*b-4*a*c))/a/2
return?e,f

import math

def quadratic_equation(a,b,c):
? ?delta = math.sqrt(b * b - 4 * a * c)
? ?x1 = (-b - delta) / (2 * a)
? ?x2 = (-b + delta) / (2 * a)
? ?return x1,x2

print quadratic_equation(2,3,0)
print quadratic_equation(1,-6,5)