Question 1202890
Find all the information that is needed.
side lengths x and x+8
area of  256 square yards
x(x+8)=256, and want the smallest perimeter, p;
p=2x+2(x+8)

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{{{x+8=256/x}}}
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{{{p=2x+2(256/x)}}}

{{{p=(2x^3+2*256)/x}}}
either use of derivative, or help of a graphing tool

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Example problem is similar to https://www.algebra.com/algebra/homework/Surface-area/Surface-area.faq.question.965885.html
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