f(x)=2x+3. g(x)=3x2-2x+5. nilai gof (-2)

(g o f)(x)= g(f(x))
= g(2x + 3)
= 3(2x+3)² - 2(2x + 3) + 5
= 3(2x+3)(2x+3) - 2(2x+3) + 5
= 3(4x² + 12x + 9) - 4x - 6 + 5
= 12x² + 36x + 27 - 4x - 6 + 5
=12x² + 36x - 4x + 27 - 6 + 5
= 12x² + 32x + 26
(g o f)(-2) = 12(-2)² + 32(-2) + 26
                = 12 (4) - 64 + 26
                = 48 - 64 + 26 = 10