For me, this is the best method to solve #quadratic #equations (better than completing squares, general quadratics formula, factorization, ...)
https://twitter.com/l_d_hodge/status/546712133732696064
(Credits from "l hodge" - @l_d_hodge on twitter)
It's easy to understand, it works with $a \neq 1$ and it has meaning.
It's based on change of variables and #symmetry
Sheet about questions about area involving parts of cicle
I just point this out if you need: https://nitter.net/drpas1001/status/1508134203371700231#m
(via Dan Meyer twitter https://twitter.com/ddmeyer)
Discrimination against poor people in hairdresser
somenxavier - Never go to EQP's hairdresser
https://peluqueriaequipos.com
in Mallorca (Spain)
After several times going to this hairdresser, today they banned us to make an appointment for the next week. The "reason" was because "there are people spending 3 hours in hairdresser" and that "you only spend just 1/2 hour".
Translation: if you spend €300, then you could make an appointment; less, you could not.
Really?
repo.or.cz is down?
Admin contacted me: it seems that old hardware fails. He said to me that admins have to talk about the future of the service.
Modular laptop
Perhaps you would interest in modular #laptop called "Framework"
Sansaku Puzzles
I discovered #Sansaku Puzzles via Sarah Carter's blog:
https://mathequalslove.net/sankaku-puzzles/
Some interesting puzzles to introduce #area of #triangles in grid systems in #secondary education
DIY Computer Chips
Even #computer #chips could be made by yourself (with some knowledge). Sam Zeloof did it.
https://www.youtube.com/watch?v=IS5ycm7VfXg
Conway's conjecture solved
Just make some eco about this news:
https://cp4space.hatsya.com/2022/01/14/conway-conjecture-settled/
Gemini mailing list
How much time we have to wait to restore #gemini mailing list?
Is there any alternative way to communicate each other and plain users to gemini core developers? IRC? Matrix? Some official channel?
Can gemini project set an alternative mailing list?
I just discovered this reference about that:
Very concern about data privacy in public university course survey
I participate in a course from a public university (UIB). I have to answer a survey from LimeSurvey.
I'm very concerned about my data privacy [https://www.limesurvey.org/privacy-policy] and that a public university uses external tool to make research surveys.
Don't they have enough money to make their own survey forms software? Can they guaranteed my privacy of my data (as any good survey must have)? I don't think so.
Falta de formació de qualitat
Potser també es podria fer una formació a la UIB per als docents **de secundària**
https://twitter.com/druizaguilera/status/1435140406539345920
Backup software advice
I need a backup software in GNU/Linux. My requirements are:
- free software
- based on standard programs
- support for full and incremental backups
- User simply see the files (I don't need to uncompress or mount those as special file system)
So, for example, I drop borg from my list.
Any candidates?
Si queréis os podéis apuntar al II Congreso de Adultos
https://congresoepa.gal/programa/
Fecha: 11 y 12 de febrero de 2022. El formato es presencial y online
Anyone could create a home server like Daniel Clemente did some time ago [https://www.danielclemente.com/amarok/] (link in Spanish).
Why we don't do that and we rely on third-party actors (mostly enterprises)?
Ignorance? Danger Consequences like DDoS? or security breaches?
In my case, the only undesirable consequence of hosting my home server could be having no internet connection for other devices in my home if web server have a lot of demand (slashdot effect for example)
Per compleció, aquestes són algunes fotos de la manifestació i la convocatòria
El pròxim pas, dia 16 de desembre la comissió de medi ambient ha de pronunciar-se.
#Adults #Mathematics #Teacher. Looking for non-direct instruction #activities and their integration in class. Using almost always free (as in freedom) contents. I like very much problem-based learning (not the same as project-based one) and additive assessment.
Professor de matemàtiques. Actualment, faig feina a centre adults. Intent defugir de les classes magistrals. M'agrada l'aprenentatge basat en problemes.