When 2 inches are added to each side of a square, its area increases by 12 square inches. What is the area of the expanded square?
1 Expert Answer
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(x+2)2 = x2+12
x2 + 4x + 4 = x2 + 12
4x = 8
x = 2
Expanded Area = (x+2)2 = 42 = 16 in2
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