Your print syntax doesn't match my example. You need quotations. You need the % sign. And you need () around your variables. Syntax in programming can be understandably picky. If you follow my previous example.
print "%s %s %s %s"%(root1r, rooti, root2r, rooti)
print
But you got some of your variable names wrong. rooti should be root1i, same with root2i.
Then you can format it more nicely like so:
print "%s+%si , %s+%si"%(root1r, root1i, root2r, root2i)
print