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## #1 Introductions » Hello everybody! » 2013-02-22 12:51:45

frankitox
Replies: 3

Hi , I'm Franco, I peek this forum occasionally! It's awesome to check all the things I don't know
Anyway! I'm a computer science student, so I usually do maths, actually I'm reading "Discrete Mathematics and its Applications".
Mmm, I would love to hear why you are studying maths! researchers, professors, just an annoying hobbie?
Cheers!

## #2 Re: Help Me ! » Quick Tip on Proof Sum of Squares » 2011-12-15 12:37:09

I get it doing this

Finally! This is the way you make the cancelling? all that in your head??

Well, now i put here this resource
http://www.proofwiki.org/wiki/Sum_of_Sequence_of_Squares
(the graph is really cool)

## #3 Re: Help Me ! » Quick Tip on Proof Sum of Squares » 2011-12-15 11:50:54

Hi Bob! I'm feedbacking you really late! Sorry for that. First, I have to say thanks for the answer and your time.
Yes, I love this method for the reason that you said!
Now.. I can't see the transition here..

IF you like to explain it to me. I don't know if i'm missing a property or something like that. You write down that you was using cancelling.
Really pissed me off that I can't see it!
Mr, you have a degree on maths, or studying, or hobby?
I really appreciate you're help. Thanks

## #4 Help Me ! » Quick Tip on Proof Sum of Squares » 2011-12-04 01:36:59

frankitox
Replies: 4

First of all, I was looking for proofs for this:

I check it by induction, but I see on other topic of the forum this one:

I didn't get it from the 3rd to 4th line.
In the right side use distribution, but on the left
Can anybody 'expand it' for me?

Ps: It's my first post so if there is something wrong, just tell me. And sorry for my bad english.

Edit: Here is the old post http://www.mathisfunforum.com/viewtopic.php?id=2014