2. The mean is the average so it phase shifted up five points where as the range is the difference between the highest and lowest # which wouldn't change if all the numbers were adjusted.
First 8.58
Second 8.508
Third 7.5
Fourth 7.058
I believe 25 has to be added as
(x*5)^2 = x^2 + 10x + 25
Answer:

Step-by-step explanation:
Given

Required:
Simplify
We start by opening the bracket


Collect Like Terms

Hence, the equivalent expression is 