Question

A farmer has 200 m of fencing from which to build a temporary pen, using an existing permanent fence.
If the pen is a rectangle, of width x m:

a) find the area of the pen in terms of x

b) complete the square and find the maximum area of the pen and the corresponding value of x.
​

Answer 1

a) 400x

Sorry, if I've given the wrong answer, but atleast I tried.