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Designate the side length of the original square by s. Then, from the problem statement, (s + 3)2 = 39 + s2. Multiplying out the binomial and collecting like terms yields 6s = 30 or s = 5.

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Q: When each side of a given square is increased by 3 feet the area is increased by 39 square feet Determine the dimensions of the original square?
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