Respuesta :

edsheeran14

Answer:

-a^2-a+12

Step-by-step explanation:

After multiplying and opening the brackets

we get

-a^2-4a+3a+12

=-a^2-a+12. ( simplifying)

hope it helps.....

Cathenna

Answer:

[tex] \boxed{\sf -a^2 - a + 12} [/tex]

Step-by-step explanation:

⇒(-a + 3)(a + 4)

⇒-a(a + 4) + 3(a + 4)

⇒(-a)(a) + (-a)(4) + (3)(a) + (3)(4)

⇒-a² - 4a + 3a + 12

⇒-a² - a + 12