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A square has an area of 4x^2+12xy+9y^2 square meters. What is the perimeter of the square?

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Nataliya D. | Patient and effective tutor for your most difficult subject.Patient and effective tutor for your mos...
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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