Answer:
9w + 20 + w²
Explanation:
Phew, this is a toughie,
(5+w)(w+4)
Let's make this look easier:
5*(w+4) + w*(w+4)
5w + 20 + w² + 4w
Now we will collect the like terms:
5w + 20 + w² + 4w
9w + 20 + w²
That's all there is to it!
Hope this helped!
If you need any more help don't hesitate to ask me!