Answer:
0
Explanation:
to evaluate the composite function work from the inside out
first evaluate h(2) , then substitute the value obtained into g(x) then substitute the value obtained here into f(x)
h(2) = 
 , then
 , then
g( 
 ) =
 ) = 
 =
 = 
 = 1 , then
 = 1 , then
f(1) = 1² - 1 = 1 - 1 = 0