Jika f(x) = x2 + 3x dan g(x) = x – 12, maka nilai (f o g)(8) adalah?

( fog )(x) = f(g(x)) = (x-12)² + (x-12)
= x²-24x+144 + x -12
= x²-23x+132

maka, (fog)(8) = 8²-23(8)+132 = 64-184+132 = 12

semoga membantu
ㅡ :)