The numerical value of a particular square's area is equal to the numerical value of its perimeter times four. What is the length of a side of the square?
What is the length of a side of the square?
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\(a^2=4\cdot 4a\\ a^2-16a=0\\ a(a-16)\\ \color{blue}a\in \{0,16\}\)
16 is the length of a side of the square.
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