Write the expressions for: (t-s)(x)(t+s)(x)And evaluate (t?s)(-2)

Suppose that the functions s and f are defined for all real numbers x as follows. s (x) -4x 1 (x) -3x Write the expressions for (t-s) (x) and (t+s) (x) and evaluate (t's) (-2). ( t - s) (x) = 10 ( + + s ) (x ) = 1 X ? ( 1.5 ) (-2 ) = 1