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x^3 = y^2 – 15 (Posted on 2010-07-08)

Determine all possible pair(s) (x, y) of positive integers that satisfy the equation: x³ = y² – 15

See The Solution Submitted by K Sengupta

Rating: 3.3333 (3 votes)

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analytical start (dead end?)

| Comment 7 of 11 |

It didn't lead to anything, but I subtracted 1 from each side and factored to reach:

(x-1)(x*x + x +1) = (y-4)(y+4)

Posted by Steve Herman on 2010-07-09 13:56:50

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