Respuesta :

Step-by-step explanation:

the correct answer is option (a)

Answer:

A

Step-by-step explanation:

a³ - 3 + 3a² - a

a² + 3a² - a - 3

a²(a + 3) - (a + 3)

(a + 3)(a² - 1)

(a + 3)(a - 1)(a + 1)