Here's the question you clicked on:
keeponbleeding
How do I find f(x) and g(x) so the function can be expressed as y = f(g(x))? y = 8/(x^2) +4
there are a few ways this can be approached
one way is to replace the "x" term with g(x) f(x) = g(x) + 4 then define g(x) by what was replaced
@amistre64 what if \[f(x)=\frac{ 8 }{ (g(x))^{2} }+4\]
There are a few ways to approach this like @amistre64 said.