I have two functions

f(x)=$\displaystyle 9^x$ and

g(x)=$\displaystyle log_{3}(x)$

I am asked to write h(x) = (f o g)(x). I thought this should be

$\displaystyle 9^ (log_{3}(x)) $

Is this correct? How can we solve this? And the book is asking for a quadratic function, how can this be done? Thanks!