g(x) = x - 2 Nilai 2(g(x))2 + g(x2) - 3 g(x) untuk x = 3

g(x) = x-2
g(3) = 3-2
g(3) = 1
(g(3))^2 = 1^2
(g(3))^2 = 1

g(3^2) = 3^2-2
g(3^2) = 9-2
g(3^2) = 7

2(g(3))^2 + g(3^2) - 3 g(3)
=2*1 + 7 - 3*1
=2 + 7 - 3
= 6