The input is two numbers other than zero. How to display the second number with the sign of the first?

Question

Mathematics

Only elementary arithmetic is available, no ifs and modules (upd.: ...and other built-in python functions).
It will be very cool not to lay out the solution, but to give a couple of hints so that you have the opportunity to think for yourself.
upd2: Thanks to dimonchik2013 for the brilliant solution

Answer 1

More in the piggy bank of perversions:math.sqrt(a*a) / a * math.sqrt(b*b)

Answer 2

Divide the first by abs(first) and multiply the second by that result.

Answer 3

I don’t know how exactly it will be in Python, but purely mathematically it looks like this:

a * b / √( a * a )

Will I be taken to Google?)