diketahui f(x) = 5x2 - 3x + 7 dan g(x) = x + 2. fungsi komposisi (fog) (x) =…

fog(x) = f(g(x)) = f(x + 2)
= 5(x + 2)² - 3(x + 2) + 7
= 5(x² + 4x + 4) - 3x - 6 + 7
= 5x² + 20x + 20 - 3x + 1
fog(x) = 5x² + 17x + 21