Question

If f(x) = x2 − 2x + 9 and g(x) = 8 − x, what is (f o g)(−4)?

Answer 1

first find g(-4)
g(-4) = 8- (-4)
g(-4) = 12
Now plug g(-4) in f(x), you get f(g(-4)) = f(12)
f(12) = 12^2 - 2(12) + 9
f(12) = 144 -24 + 9
f(12) = 129

Answer 2

thanks much! ^