Answer: 
Step-by-step explanation:
To solve the exercise you must apply the following proccedure:
- Apply the distributive property.
- Keep on mind that when you multiply two powers with equal base, you must add the exponents.
- Add like terms.
Therefore, you obtain the following product:

Answer:
What are the dimensions of the garden?
Step-by-step explanation:
(x + 4)^4 = x^4 + 16x^3 + 96x^2 + 256x + 256