Answer:
Answer 3, 
Step-by-step explanation:
If every element of the sum is multiplied by 8, we can just pull the 8 in front of the sum symbol.
(x^2 - 4^2)^2 = x^4 - 4^4
(x^4 - 4^4) (x^2 + 4^2) = x^2 - 4^6
The Angela's solution is wrong cause when you multiply you get a different answer.
Area of polygon = 1/2 pa. So it would be 0.5 x 6 x 3. The fire the area is 9