Dik: g(x) =2x+3 (Fog)(x) =12x²+32x+26 Dit:f(x)? Mohon bantuannya

f(g(x)) = fog(x)
f(2x + 3) = 12x² + 32x + 26
f(2x + 3) = 3(2x + 3)² - 2(2x + 3) + 11
f(x) = 3x² - 2x + 11