G (x) + (-g (x)) = ...

g (x) and - g (x) are opposites of each other. So all terms would cancel each other out. The answer would be 0

Step-by-step explanation:

Eaxample:

g (x) = x + 5

g (x) + (-g (x)) =

(x+5) + ( - (x+5))

(x+5) + (-x-5)

x+5 - x - 5

x-x+5-5 = 0