You will build two identical rectangular enclosures next to a each other, sharing a side. You have a total of 324
feet of fence to use. Find the dimensions of each pen such that you can enclose the maximum possible area. One approach is to let
represent the length of fencing that the two pens share, and write a formula for a function of
that outputs the total area of the enclosures. Then find its vertex and interpret it. (Use ft for feet, and ft^2 for square feet.)