I have some homework which is bothering me. I am not sure if I ammisunderstanding the question, or it's simpler than I thought. Here it is..........

f(x) = √(3x-3)

g(x) = x+7

Find:

fg(x),gf (x)

I am confused by the comma. Am I just being asked to calculate fg(x) and then gf(x), or does thecomma mean after calculating fg(x) and gf(x) I then have to calculate theirproduct?

I get fg(x) to be √((3x+7)-3), and

gf (x) to be (√(3x-3)) +7

Should I go on to multiply fg(x) and gf(x)? It's that comma that's confusing me.

Thanks