Verified Answer :

the answer is 3 - 9 ab  = ay.. I hope this helped

\(Find \ the \ Greatest \ Common \ Factor \ (GCF)\) 

\(GCF = 3\) 

\(Factor \ out \ the \ GCF\) 

\(3( \dfrac{ \dfrac{3}{a}}{3}+ \dfrac{-9b}{3})\) 

\(3( \dfrac{1}{a}-3b)\)