Respuesta :

9514 1404 393

Answer:

  A.  (f-g)(x) = -5^x +3x -2

Step-by-step explanation:

The only terms that can be combined are the constants.

  (f -g)(x) = f(x) -g(x)

  (f -g)(x) = (-5^x -4) -(-3x -2) = -5^x -4 +3x +2

  (f -g)(x) = -5x^4 +3x -2 . . . . . matches A