Question

Jika diketahui f(x)= x2-3x-4 dan g (x)= 2x+3 tentukan (fog) (x). tolong Bantu yaa

Answer 1

(fog)(x) = f(g(x))
f(2x + 3) = (2x +3)² -3(2x +3) - 4
             = 4x² + 12x + 9 -6x -9 - 4
             = 4x² - 6x - 4

Answer 2

F(g(x))= x2-3x-4
f(g(x))=(2x+3)2-3(2x+3)-4=4x2+12x+9-6x-9-4=4x2+6x-4