if f(x)=x^2-5 and g(x)=6x then g(f(x)) is equal to
g(x) = 6x g(f(x)) = 6((x^2) - 5) = (6x^2) - 30 so its equal to(6x^2) - 30
Plug f(x) as x in g(x) and you get 6(x^2-5), which is g(f(x)) = 6x^2-30.
