Respuesta :

Answer: -x^2+2x+8

Step-by-step explanation:

(f-g)(x)=2x+1-(x^2-7)

(f-g)(x)=2x+1-x^2+7

(f-g)(x)= -x^2+2x+8

Answer:

x^2 + 2x - 6

Step-by-step explanation:

(f + g)(x) = f(x) + g(x)

= (2x +1) + (x^2 - 7)

= x^2 + 2x - 6