Question

f(x) = x2 – 9, g(x) = 2x + 3 and h(x) = x - 3. Find each of the following.
d) f(g(h(x)))
e) (g – h)(8)
f) h(f(-2))

Answer 1

f(g(h(x))) =

Answer 2

i think
d)2x^2-9
e)14
not so sure though.

Answer 3

f) -8
not sure of the answers

Answer 4

A response using Mathematica 9 is attached.

Answer 5

thanks
@robtobey