diketahui f(x)=5x+4 dan g(x)=x-17 tentukan a(f+g)(x) b g-f(x) c f.g x

f(x) = 5x + 4
g(x) = x - 17

a. (f+g)(x)
= 5x + 4 + x - 17
=6x - 13

b.(g-f)(x)
=x - 17 - 5x + 4
= -4x - 13

c.(f.g)(x)
= (5x+4) (x-17)
=5x² - 85x + 4x - 68
=5x² - 81x - 68