Answer:
g(f(x)) = 36[tex]x^{4}[/tex] - 54x² + 12
Step-by-step explanation:
Substitute x = f(x) into g(x) , that is
g(6x²)
= (6x²)² - 9(6x²) + 12
= 36[tex]x^{4}[/tex] - 54x² + 12
