Talk:Bhaskara's lemma

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This is my first page addition on wikipedia. I copied the references from the "parent" page this came from. Is that okay or should references be cited only if they were used to research the article? 05:59, 29 September 2007 User:800km3rk

References should help later readers verify statements in the article. So they need to be relevant to this article. --Rumping (talk) 13:57, 14 August 2008 (UTC)

First line of proof[edit]

I got lost in the first line of the proof. Where did

come from? I have provided what I think is a simpler alternative proof, and if there are no objections I will delete the original later. --Rumping (talk) 13:57, 14 August 2008 (UTC)

There has been no objection in six weeks so I have removed the original. It follows here in case anybody want to see it. --Rumping (talk) 22:36, 29 September 2008 (UTC)

Earlier version of proof[edit]

We begin with an identity, verified by expansion (or substitution into the Brahmagupta-Fibonacci identity with ) :

Since , we have that:

Suitable re-arrangement of this equation yields Bhaskara's Lemma: