f(g(x)) = 9x^2 - 3x - 4
Step-by-step explanation:
Assuming it’s
f(x) = x^2 + 3x - 2
and g(x) is linear:
f(g(x)) = (3x - 2)^2 + 3(3x - 2) - 2
= 9x^2 -12x + 4 + 9x - 6 - 2
= 9x^2 - 3x - 4