3:59 AM
Just an observation which might be useful for other users searching via Approach0 - parenthesis can make a difference.
This question appeared today: Divisibility Proof $8\mid (x^2 - y^2)$ for $x$ and $y$ odd. I suspected that it must have been asked before, so I tried to search.
Results of searching for $8\mid (x^2 - y^2)$, odd and searching for $8\mid x^2 - y^2$, odd are quite different.
Which is probably not surprising. But people like me might need some time to get used to this - in google adding or removing the parenthesis would not make much of a difference: "8\mid a^2-b^2" site:math.stackexchange.com and "8\mid (a^2-b^2)" site:math.stackexchange.com.
« first day (7 days earlier) ← previous day next day → last day (2726 days later) »
Transcript for
Oct8
Oct '169
Oct10
In the search of a question
When you are looking for a specific question (using Approach0 ...