Respuesta :

Answer:

(f-g)(x)   =  -x^2 + 3x + 7

Step-by-step explanation:

Note that -g(x) = -x^2 + 6.

Thus, (f-g)(x) = f(x) + [-x^2 + 6]:  Add the following:

f(x)       =   3x + 1

-g(x)     = -x^2 + 6

---------     ------------------

(f-g)(x)   =  -x^2 + 3x + 7 (answer)