this post was submitted on 24 Jul 2024
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Science Memes

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Conversing with Mathematicians (mander.xyz)
submitted 4 months ago by [email protected] to c/[email protected]
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[–] [email protected] 169 points 4 months ago* (last edited 4 months ago) (7 children)

What about plain old x = -10?

-10 ^ 2 = 100
-10 ^ 3 = -1000
-10 ^ 5 = -100000

[–] Redacted 120 points 4 months ago

Isn't that the joke?

[–] [email protected] 67 points 4 months ago (1 children)

That's what he wrote, I imagine.

[–] Siethron 39 points 4 months ago (1 children)

It is, but with imaginary numbets

[–] gofsckyourself 20 points 4 months ago (1 children)

numbet

[–] [email protected] 2 points 4 months ago

numberwang

[–] [email protected] 43 points 4 months ago

i² = -1 so...

[–] [email protected] 24 points 4 months ago

10 * i^2 is -10.

[–] [email protected] 16 points 4 months ago (1 children)

Nothing gets past you eh?

[–] [email protected] 35 points 4 months ago (1 children)

people being pedantic showoffs doesn't really register as humor for me, TBH

[–] [email protected] 12 points 4 months ago

That's true, the OOP is being quite snarky with their comment on a post where someone's had a genuine basic doubt

[–] [email protected] 8 points 4 months ago

That was my immediate thought too.

[–] [email protected] 4 points 4 months ago

Boooooring

[–] [email protected] 96 points 4 months ago (1 children)

When all you have is an imaginary hammer, everything looks like a rotation around the imaginary unit circle.

Explanation of mathsx = -10, i = √-1 so i² = -1 and 10i²=-10

[–] [email protected] 15 points 4 months ago (1 children)

Found the math but no explanation.

[–] [email protected] 15 points 4 months ago (1 children)

The squareroot of 100 is ±10.

[–] [email protected] -3 points 4 months ago (3 children)

The square root is always positive, but you can plug it into the quadratic formula to get the two possible values.

[–] [email protected] 17 points 4 months ago (1 children)

Okay, fine the square roots of 100 are ±10.

[–] Eheran 1 points 4 months ago

Seems very inaccurate the we can only determine the square root to +-10.

[–] [email protected] 8 points 4 months ago

There's no reason to bring the quadratic formula into this. Square roots can be negative, but when talking about the square root it's normally assumed to be the principal square root, which is the positive one.

[–] [email protected] 1 points 4 months ago* (last edited 4 months ago)

Nope. To clarify, square roots are the opposite of squaring.

Now ask yourself:

What is 10² ?

What is (-10)² ?

If you get the same answer, then they are both the roots of the answer. +10 and -10 then gets together called ±10

[–] [email protected] 35 points 4 months ago (1 children)

Wait, isn’t x just -10 if x^3 is not 1000?

[–] bi_tux 15 points 4 months ago

yes, it is

[–] iAvicenna 27 points 4 months ago

that is a very long way to write -10

[–] [email protected] 13 points 4 months ago (2 children)

My brain

It hurts

[–] Cryophilia 44 points 4 months ago (1 children)

That's because the explanation was about 10 times as complicated as it needs to be

[–] olafurp 12 points 4 months ago (1 children)

Math pun intended?

[–] Cryophilia 5 points 4 months ago

[–] [email protected] 23 points 4 months ago

He is trolling with overcomplicating

[–] [email protected] 10 points 4 months ago (1 children)

No definition what values are suitable for x.

[–] [email protected] 20 points 4 months ago (3 children)

x has to be -10, right? Or am I missing something?

[–] jacksilver 6 points 4 months ago (2 children)

Yeah, I think the point is that the person answering was wrong/over complicating. If x=10i, then x^2 would be -100 (or potentially -10 depending on what you think the ^2 is applied to).

[–] Khanzarate 22 points 4 months ago

They said x=10i^2, not 10i. Difference is it equals -10, and they chose not to simplify.

[–] [email protected] 4 points 4 months ago

They're correct, it's just overcomplicated as fuck in ways that are correct but completely irrelevant to the question.

[–] [email protected] 4 points 4 months ago

The answer in the meme (10i^2) is -10

[–] [email protected] 4 points 4 months ago

Depends on what are the allowed values for x are. Real numbers, complexe numbers, binary or I made up my own numbers ;)

[–] [email protected] 9 points 4 months ago (2 children)

What an extremely unnecessary explanation. As a math teacher I would have deducted points for this answer.

[–] [email protected] 7 points 4 months ago

"show your work"

Malicious compliance intensifies

[–] [email protected] 1 points 4 months ago

Unless I was in that clas where we had to write mathematical proofs. I HATED those. Sure, you solved the question but write out this complicated reason for why your answer is the correct answer.