Jika f (x) = 2x² +5x -7 dan g(x) 3x-12 maka nilai (g o f) (2)

f(x) = 2x² + 5x - 7
f(2) = 2.2² - 5.2 - 7
f(2) = 8 - 10 -7
f(2) = -9

g(x) = 3x - 12

g(f(2))
= g(-9)
= 3 . (-9) - 12
= -27 - 12
= -39