diketahui fx = x - 3 dan GX = X² + 5 jika f•GX =g•f x maka nilai x adalah

f(x) = x-3
g(x) = x²+5

fog (x) = gof (x)
f [g(x)] = g [f(x)]
(x²+5) -3 = (x-3)²+5
x²+2 = x²-6x+9+5
x²+2 = x²-6x+14
x²- x²+ 6x = 14 - 2
6x = 12
x = 2


Semoga membantu :)