(f o g) = 2(3x – 6)^2 + 3(3x – 6) – 10
(f o g) = 2(9x^2 – 36x + 36) + 9x – 18 – 10
(f o g) = 18x^2 – 72x + 72 + 9x – 28
(f o g) = 18x^2 – 63x + 44

(f o g)(3) = 18(3)^2 – 63(3) + 44
= 162 – 189 + 44
= -27 + 44
= 17