Question

h(x)=x^2-2

g(x)=4x+1
find (h o g)(x)

Answer 1

substitute g(x) in place of x into h(x)

(h o g)(x) = h[g(x)] = [g(x)]^2 - 2 = (4x + 1)^2 - 2 = 16x^2 + 8x - 1