Respuesta :

Answer:

-2x²-4x or -2x(x+2)

Step-by-step explanation:

(f+g)(x) means we are adding the values of f(x) and g(x):

f(x) = -2x²-9x

g(x) = 5x

(f+g)(x) = -2x²-9x+5x = -2x²-4x = -2x(x+2)