Something

import math
from math import sqrt

print "These are the zeroes of a secong grade polynomial"
a=float(raw_input("Type a ="))
b=float(raw_input("Type b ="))
c=float(raw_input("Type c ="))
aux=b*b-4*a*c;
if aux>0:
    x1=(-b+sqrt(aux))/(2*a)
    x2=(-b-sqrt(aux))/(2*a)
    print "x1= " , x1 ,", x2=" ,x2 
elif aux==0:
    print "x= " , -b/(2*a)
else:
    x1=sqrt(-aux)/(2*a)
    x2=-b/(2*a)
    print "x1= " , x2 , "+" , x1 , "j, x2=" , x2 , "-" , x1 , "j"