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Indivisibility by 529 (Posted on 2016-07-25) Difficulty: 3 of 5
Prove that for any integer x, the value of x^2+7x+18 is not divisible by 529.

See The Solution Submitted by Brian Smith    
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Some Thoughts re: completing the square Comment 3 of 3 |
(In reply to completing the square by xdog)

Very nice!
  Posted by Ady TZIDON on 2016-07-25 23:34:57

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