better internalized as (a+b)²=2(a²+b²)-(a-b)²
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Wow. This approach seems so much more intuitive to me! Thanks for pointing it out!
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Et on dit que les matheux ont souvent la tête en l'air...
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This helps

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@fermatslibrary visual proofs like these must be compiled. Perfect potential lightbulb moment for young would-be math enthusiasts
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Love those visual proofs!
Thanks. Twitter will use this to make your timeline better. UndoUndo
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Yo dando pena ajena por los siglos de los siglos amén.


pic.twitter.com/EuCJK4dNHA
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Jajajajajajaja ¡así somos todos!
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