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re: what is the answer to this facebook math problem?

Posted on 2/2/17 at 10:03 am to
Posted by Spock's Eyebrow
Member since May 2012
12300 posts
Posted on 2/2/17 at 10:03 am to
quote:

Why not just say n^2 + 4n = x?



Because that trivial algebraic manipulation hides the trick they're using that I wanted to expose.
Posted by DrEdgeLSU
Baton Rouge, LA
Member since Dec 2006
8191 posts
Posted on 2/2/17 at 10:10 am to
True, this will only work when b = a + 3 for every line. It makes the value of b irrelevant.
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