Answer:
-7
Step-by-step explanation:
We have f(g(2), start from the inside and work out, so we first need g(2), which is...
g(2) = 2² -6(2) - 7
g(2) = 4 - 12 - 7
g(2) = -15
So g(2) = -15
Now find f(-15)
f(-15) = -15 + 8
f(-15) = -7
So f(g(2)) = -7
