Question 465574
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Hi,
<img src="http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/PerimeterRectangle.svg/200px-PerimeterRectangle.svg.png">
 P = 2L + 2W
 24cm = 2L + 2W
   12 = L + W
Let x and (12-x) represent the width and length respectively
 A = x(12-x)   or  12x-x^2