Noein
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Next privilege 250 Rep.
 Apr6 comment Problem understanding the Axiom of Foundation It's 3 am over here and this makes sense... scary. I sort of get it now, though. There must be (a) 'most elementary composition part(s)' for a set; something that can't be broken down further into a kind that can belong to the big set, or something like that. Apr5 comment Problem understanding the Axiom of Foundation If I may ask, which member of $x$ doesn't intersect it? Complete math beginner here (came here after reading something about Haskell; I just want a pointer to which element you mean). Sep24 awarded Autobiographer Aug2 awarded Teacher May18 comment Signs in binomial expansions Thank you; the gears clicked into place! Once the exams are over, I'll put on an answer that's -hopefully- as intuitive as I get it now. May18 awarded Supporter May12 comment Signs in binomial expansions That doesn't tell why it was decided (apparently, that's how I was given it) that such terms, at face value, need the expansion with opposite signs. I added an (*) in the \$\$ so see there for what I meant. May12 asked Signs in binomial expansions May12 comment Conditions on roots of a quadratic Tomorrow's the exam. I'm keeping all this in mind and hoping for he best... May12 awarded Scholar May12 accepted Conditions on roots of a quadratic Apr15 comment Conditions on roots of a quadratic Apr15 comment Conditions on roots of a quadratic @KannappanS, Discriminant! I wrote it the other way as I remembered its pronunciation in class... So many faults in my educational system... Anyway, it's ($\Delta = b^2-4ac$). Apr15 comment Conditions on roots of a quadratic He asked for my trial on the second one and so I did... I never intended it to be un-respectful and I knew it doesn't work in questions yet I only wanted it visible as the answer he requested. Apr15 awarded Commentator Apr15 comment Conditions on roots of a quadratic Now what? {Extra Characters} Apr15 revised Conditions on roots of a quadratic Answer 1 Apr15 comment Conditions on roots of a quadratic I tried it with the second and can't get the $x$ and $n+3$ out... Where can I post a photo? Apr15 comment Conditions on roots of a quadratic Can't delete prev. comments. - @JohannesK, Isn't Vieta's formula where we use a discrement to extract the roots? I tried but that didn't work. Apr15 comment Conditions on roots of a quadratic @GerryM, I'd said it was weird from the get go... It did actually use different case letters! - It's from my curriculum book, 10th grade equiv., Egypt.