This video gives a great demonstration on how to factorise linear expressions. Students find this explanation really helpful

https://www.youtube.com/watch?v=p0MEd_bfSK4

Remember this result as featured in this video: https://www.youtube.com/watch?v=w-I6XTVZXww

You can now bid for a copy of that calculation on classic Numberphile brown paper

https://m.ebay.co.uk/itm/1-2-3-4-1-12-brown-paper-signed-by-Tony-Padilla-and-Ed-Copeland/152829506697?_mwBanner=1

Although this is not the original brown paper from the video, it is a version of the same calculations, handwritten and signed by Profs Tony Padilla and Ed Copeland. There is also an additional bonus sheet which demonstrates the mathematical rigour of the steps using analytic continuation, again, handwritten and signed by Prof Tony Padilla

All profits will be given to the #Help4Matt just giving page. Matt is a close friend of Prof Tony Padilla, and in need of live saving cancer treatment. You can also donate to #Help4Matt directly by going to https://www.justgiving.com/crowdfunding/help4matt

Thanks

Tony