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Three squares imply the fourth (
Posted on 2018-03-18
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Show that if x,y,z are positive integers, then (xy+1)(yz+1)(zx+1) is a perfect square if and only if xy+1,yz+1,zx+1 are all perfect squares.
Source: the probem posed and resolved by Euler.
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Submitted by
Ady TZIDON
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Subject
Author
Date
Partial algebraic solution
broll
2018-03-28 06:50:15
How it goes
armando
2018-03-21 17:31:18
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