Is the denominator (-3ab - 6cd) or -(3ab -6cd)?
It will simplify more if it is the latter.
In either case, factor out the 3.
ab-2cd/-3ab-6cd
simplify?
2 answers
ab-2cd
_______
3(ab-2cd)
cross out ab and cd, gives you 3 as the answer
_______
3(ab-2cd)
cross out ab and cd, gives you 3 as the answer