# Short multiplication formula help

### Short multiplication formula help

Is there any short multiplication formula for:
a^2 + b^2 = ?
dancho

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Joined: Fri Mar 10, 2006 4:06 pm
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no there isn`t

SAPOSTO_S_R

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Joined: Tue Sep 26, 2006 1:52 pm
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### I am not so shure

I think that there is such a formula, but I can not remember it

yppetrov

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Joined: Sun Dec 10, 2006 12:19 pm
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### Re: Short multiplication formula help

dancho wrote:Is there any short multiplication formula for:
a^2 + b^2 = ?

Perhaps you are thinking of the difference of squares ...

a^2 - b^2 = (a+b)(a - b)

David

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Joined: Wed Oct 03, 2007 9:17 am
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does $$(a+)^2-2ab$$ count? Although it isn't exactly a formula...

martosss

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### answering the question

a^2+b^2=(a+b)^2 - 2ab
parvez

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