diketahui f(x)=3x-6 dab g(x)= 2x+a. jika (f ° g) (x) =(g ° f) (x), maka a =

f(x) = 3x - 6
g(x) = 2x + a

(fog) (x) = (gof) (x)
f(g(x)) = g(f(x))

3(2x + a) - 6 = 2(3x - 6) + a
6x + 3a - 6 = 6x - 12 + a
6x - 6x + 3a - a = -12 + 6
2a = -6
a = -6/2
a = -3