Minta tolong banget Bantuin No 4 ya

a. (h o g)(x) = h(g(x))
= h(1 - 3x)
= (1 - 3x)² - 1
= 1 - 6x + 9x² - 1
= 9x² - 6x

(h o g)(3) = 9(3)² - 6(3)
= 63

b. (h o g)(x) = 3
9x² - 6x = 3
9x² - 6x - 3 = 0
3x² - 2x - 1 = 0
(3x + 1)(x - 1) = 0
x = - ⅓ atau x = 1