Tolong dong penyelesaiannya! f(x)=2x²-4x-6 9(x)=x-3

.(fog)(x) = f(x-3)
(fog)(x) = 2(x-3)² - 4(x-3) - 6
(fog)(x) = 2(x²-6x+9) - 4x + 12 - 6
(fog)(x) = 2x²-12x+18-4x+13-6
(fog)(x) = 2x²-16x+25

Trimakasih. Semoga bermanfaat.
-Rifandi