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**Kumar Gaurav****Member**- Registered: 2014-05-25
- Posts: 8

Hey I was just playing with nos. I found a formula to sq. A no. I.e.

(<n-1>squared)+(2n+1)

'n' here implies the no. You want to sq.

*Last edited by Kumar Gaurav (2014-05-25 22:11:33)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,394

Hi;

I can not follow that. Please explain a little better.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Kumar Gaurav****Member**- Registered: 2014-05-25
- Posts: 8

This works if you know sq of no. Which lies before it just add 2xno.+1 to sq of no. Lying before the no.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,394

You mean like this:

(2 * 6 + 1) + 6^2 = 49 which is 7^2?

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Kumar Gaurav****Member**- Registered: 2014-05-25
- Posts: 8

bobbym wrote:

You mean like this:

(2 * 6 + 1) + 6^2 = 49 which is 7^2?

yes sir!

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,394

Hi;

This is because of the algebraic identitiy

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Kumar Gaurav****Member**- Registered: 2014-05-25
- Posts: 8

Thanks for informing I will post more.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,394

Welcome to the forum.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Kumar Gaurav****Member**- Registered: 2014-05-25
- Posts: 8

bobbym wrote:

Welcome to the forum.

thanks

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