Welcome to Touhou We have Reimu - solving problems and wants donation Marisa - solving problems and ready to steal ur properties Sakuya - Dio's isekai'd daughter Youmu - half-youkai samurai that one of her blades found in League of Legends Yukari - hag with hax Cirno - "smort" and "geniyus" ice fairy Flandre - Jevil's psychotic duo Seija - Aussie of Gensoukyou Reisen - Yusuke but gives u LSD Kaguya - NEET Patchouli - nerd with asthma and anemia(she have it canonically) Chen - gurenya~ Yuyuko - Gluttonous mommy Koishi - gives u mental breakdowns and schizophrenia Utsuho - birb from Chernobyl Tewi - commiting a little bit of trolling and tomfoolery
@@UltimaDoombotMK1 What you are talking about is the "square root of 81", which is both positive and negative 9. However, in this context, since the sign is positive, it only implicates positive 9, and not negative 9. Please refer to your textbooks; they will most likely try to differentiate between "square root of x" and "radical x".
@@niji_k sign is positive? How do you get a negative square root sign? Besides, I've been told, as have most people in my maths classes, that if it doesn't say, then do both Positive and negative. "√81" does not specify only positive, hence it is both. Also, even if it only implicates positive 9, and does not implicate negative 9, that does not exclude negative 9 from being an answer.
@@UltimaDoombotMK1 The square root of 81 is both 9, and -9. That is true, and I can see that you've been doing well on math class. What you are seeing, however, is "radical 81". Basically, when we talk about the square roots of a number, it implies both the positive one, and the negative one. In this case, 9, and -9; just as you stated earlier. So how can someone know if 1+√9 is 4, or -2? It's quite simple, because, we can use signs to tell the positive one from the negative one. √x (read as "radical x") denotes the positive square root of x, and -√x (read as "negative radical x") denotes the negative one. Thus giving the answer to your point: √81 denotes ONLY positive 9, and if one were to write -9, -√81 should have sufficed. "x=√y" and "x^2=y" are different equations, albeit misleadingly similar.
@@niji_k I suppose you are right there: most of the time we just use √x to mean the positive root. It's usually only in things like quadratic equations and such where you'd get 2 answers, or unless they specifically state that there should be 2.
A PhD is more of a philosofics degree that open your CV to high paying jobs even a master's (with experience) can net you a high paying job in my country (because it gives the company bragging rights).
While Cirno has passed Math it would appear She still has to get through English judging by how she thinks PhD= Perfect Math Class. (PS, Happy Cirno Day!)
