If \(d^2\) divides \(a^2\), show that \(d\) divides \(a\)
\(d,a\in \mathbb{Z}\)

If \(d^2\) divides \(a^2\), show that \(d\) divides \(a\)
\(d,a\in \mathbb{Z}\)

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Slick way with FTA
http://math.stackexchange.com/questions/182988/if-a2-divides-b2-then-a-divides-b

that ruins the fun lol

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