Patricia purchased x meters of fencing. She originally

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Patricia purchased x meters of fencing. She originally intended to use all of the fencing to enclose a square region, but later decided to use all of the fencing to enclose a rectangular region with length y meters greater than its width. In square meters, what is the positive difference between the area of the square region and the area of the rectangular region?

(1) xy = 256
(2) y = 4




OA B

Source: Official Guide
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