Question 44169
{{{9x^3y^2-36x}}}
{{{x(9x^2y^2-36)}}}
{{{9x(x^2y^2-4)}}}

I hope this helps 
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk