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Story problem

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1 Answer

1. (a ± b)2 = a2 ± 2ab + b2  
2. A = a2 , P = 4a

A = (2x)2 + 2 · 2x · 3y + (3y)2 = (2x + 3y)2
P = 4(2x + 3y) = 8x + 12y