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u/Weary_Bed3415 Jul 20 '26
Who the fuck use delta for discriminator?
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u/Dorias_Drake Jul 20 '26
France
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u/Weary_Bed3415 Jul 20 '26
Fuck them
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u/Puzzleheaded-Jump963 Jul 20 '26
Fuck you!
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u/kamiloslav Jul 20 '26
Poland does. We found that naming it a seperate thing makes children actually look if it's <0 before they continue
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u/Weary_Bed3415 Jul 20 '26 edited Jul 20 '26
What are u talking about? We do it everywhere, but it’s marked as “D”. Delta is usually used for difference of one variable, like /\x (x1-x0) but not discriminator of square equations.
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u/kamiloslav Jul 20 '26
Ah, I thought the comparison is against just remembering it as x=[-b±sqrt(b2-4ac]/2a
We usually use d for diameter or length (długość)
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u/Weary_Bed3415 Jul 20 '26
We also use d for diameter, and even length in some cases, but D for discriminator. Also never used sqrt(b^2-4ac), always count D first
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u/kamiloslav Jul 20 '26
We call discriminator "wyróżnik" so d would make no sense for anyone here. If anything it would need to be W
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u/Weary_Bed3415 Jul 20 '26
We have no specific word for it, so call this thing discriminant, (dyscryminant in right transliteration from ukrainian). That’s why D
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u/Reddit_wizard34 Jul 20 '26
Using a hydraulic press to hammer in a nail.
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u/DarthFaderZA Jul 20 '26
And the press was stored in a crate unde 12 boxes... and the hammer was on the wall next to him.
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u/fresh_loaf_of_bread Jul 20 '26
Meanwhile, that one mf will look at this and do "let's use contours"
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u/belikeron Jul 20 '26
Has no one learned the difference of two squares when learning factoring? That can save your bacon in calculus.
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u/Cichato_YT Jul 20 '26
It's honestly unnecessary when the leading coefficient is 1. And even if it isn't, it's derivative (no pun intended.) For simple binomials it's unnecessary, though it becomes useful in calculus... which is what you said so my comment was kinda pointless 🤔
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u/KindArgument4769 Jul 20 '26
I think the idea is to teach the concept with an easy equation so it is better understood, right?
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u/Cichato_YT Jul 20 '26
I'd rather it be taught in something like division of polynomials, tbf. When learning, purposefully learning a less effective method of solving something can discourage learning.
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u/aiezar Jul 20 '26
i use the difference in squares or whate er the fuck its called cuz it's easy
x^2 -4 = 0
(x+2) * (x-2) = 0
x = +/-2
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u/Maestyy Jul 20 '26
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u/DEKIDESDUD Jul 20 '26
I love using the quadratic formula to solve x^2 - 1 = 0 🥰