Question 998525
The length of the sides of a square swimming pool are all s units long.
 The pool is bordered by square paving stones that are 1-unit long.
 The paving stones form a square border all of the way around the pool (including stones in the corners).
 Write an expression to represent the perimeter of the pool with the paving stones. 
:
A border 1 unit wide would increase the length of 1 side by 2 units. Therefore:
p = 4(x+2)