A rancher has 4,648 feet of fencing available to enclose a rectangular area bordering a river. He wants to use part of the fencing to create two partitions to separate his cows, horses, and pigs by dividing the enclosure into three equal areas. No fencing is required along the river. Let x represent the length of the partitions. Complete parts a. through d.

a. Create a function, A(x), that describes the total area of the rectangular enclosure as a function of x, where x is the length of a partition.

A(x) = _____

(Simplify your answer.)