BdMO National Junior 2019/8

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samiul_samin
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BdMO National Junior 2019/8

Unread post by samiul_samin » Mon Mar 04, 2019 8:51 am

$M$ & $N$ are two distinct positive integer. If L.C.Mof $M,N$ is $M^2-N^2+MN$. Prove that $MN$ is a perfect cube.

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