diketahui f(x)=2×2-×+5 dan g(x)=×+3.fungsi komposisi (fog) (x)

f (x) = 2x^2 - x + 5, g(x) = x + 3
( fo g ) (x) = f { g(x) }
= f (x + 3)
= 2 (x+3)^2 - (x + 3) +5
= 2 (x^2 +6x +9 ) -(x +3) +5
= 2x^2 +12x + 18 - x -3 +5
= 2x^2 + 11 x +20