Respuesta :

bcalle
The rule to remember for this problem is: i^2 = -1
(4 + i)(1 - 5i)
4 - 20i + i - 5i^2
4 - 19i + 5
9 - 19i

Answer:

9 - 19i

Step-by-step explanation:

RELAXING NOICE
Relax