Answer:
f[g(x)]
7(x^2)-9
Step-by-step explanation:
(fºg)(x) read: f of g of x. And can be seen written like in this format: f[g(x)]. Which I prefer.
The expression f[g(x)] means that you put the expression g(x) into the x variable for f(x). Comment if you need a better explanation :)
