f(x) = 3x-7, (fog)(x) = 6x²-9x+8. nilai g (1) =.....

(f o g)(x) = 6x² - 9x + 8
3g(x) - 7 = 6x² - 9x + 8
3g(x) = 6x² - 9x + 15
g(x) = 2x² - 3x + 5

g(1) = 2(1)² - 3(1) + 5
       = 2 - 3 + 5
       = 4