Can someone please help me again?

Given that $\displaystyle f(x)=3x^2-3\ \mbox{and}\ g(x)=\sqrt{x-2}$

evaluate

$\displaystyle fg (x)$

I am a bit confused on how to multiply these two functions.

Am I allowed to times each of the terms under the square root sign separately(probably not)?

How do I perform this operation then?

Thank you!