Respuesta :

Answer: (f + g)(x) = 2x³ + 2x² - x - 10

Step-by-step explanation:

     f(x) = x³ - x

+  g(x) = x³ + 2x² - 10

(f + g)(x) = 2x³ + 2x² - x - 10         (add like terms)