Respuesta :

Answer:

-4 + 16 i

Step-by-step explanation:

You are dealing with imaginary numbers so i dont remember y but i know that it is that answer

Answer:

- 4 + 16i.

Step-by-step explanation:

4i(4 + i)

= 16i + 4i^2       Now i^2 = -1 so we have:

16i - 4   (answer)