O GRAPHS AND FUNCTIONS Sum, difference, and product of two functions Suppose that the functions g and / are defined for all real numbers x as follows. g (x) = 4x- h (x) = 2x Write the expressions for (h- g) (x) and (h - g) (x) and evaluate (h+g) (-2). ( h - =) (x) = 0 (h. =) (x) = 1 X 5 (h + = ) (-2) = 0