Given f(x) = 5x - 2 and g(x) = -8x + 9, find (f - g)(x).

Answer 1

to do this, just subtract the similar terms:
(f-g)(x) = 5x-2 - (-8x+9)
(f-g)(x) = 5x + 8x - 2 - 9
(f-g)(x) = 13x - 11

so there,, :)