



 
Hi Billy, Suppose the garden is L feet long and W feet wide. The perimeter is then
so
or
The area of a rectangle is the length times the width so
Substitute equation (1) into equation (2) and you will have the area expressed as a function of W. If you are studying calculus you can now use calculus to maximize this function. If you are studying algebra and you know how to maximize a quadratic you can proceed that way. I hope this helps,  


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