Sort:  

because (a*a) = a^2
and ( (a+1) * (a-1) ) = (a^2 - 1^2) = a^2 - 1
[3rd binomial formula]

Great work on the proof!!

WARNING! The comment by david-ams below links to a known phishing site that could steal your account. Do not open links from users you do not trust. Do not provide your private keys to any third party websites.

Thanks for the heads up!

Great tip! I love "formulas" like this

Hello mes !
I want to check on you!
I found same content inside another post:
Proof of Tears: My logo for Teardrops Smart Media Token

Are you sure about the autenticity of your post?
If you think that this is an error, look on

my blog / https://steemil.com/@cheetah
to see how to fix it.

Coin Marketplace

STEEM 0.17
TRX 0.13
JST 0.027
BTC 59694.50
ETH 2603.45
USDT 1.00
SBD 2.54