Question

If f(x) = x2 - 1, and
g(x) = x + 2, then
f(g(x)) = [? ]x2+[?]x+[?]

Answer 1

Explanation:

f.g(x) = f(x+2)

=(x+2)2 -1

=(x2+2*x*2+4)-1

=x2+4x+4-1

=x2+4x+3