this post was submitted on 24 Jul 2024
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Science Memes

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Conversing with Mathematicians (mander.xyz)
submitted 3 months ago by [email protected] to c/[email protected]
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[–] [email protected] 2 points 3 months ago* (last edited 3 months ago) (2 children)

What about plain old x = -10?

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

[–] [email protected] 2 points 3 months ago

Isn't that the joke?

[–] [email protected] 1 points 3 months ago (1 children)

That's what he wrote, I imagine.

[–] [email protected] 3 points 3 months ago (1 children)

It is, but with imaginary numbets

[–] [email protected] 2 points 3 months ago

numbet

[–] [email protected] 1 points 3 months ago

that is a very long way to write -10

[–] [email protected] 1 points 3 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] 0 points 3 months ago (1 children)

Found the math but no explanation.

[–] [email protected] 0 points 3 months ago (1 children)

The squareroot of 100 is ±10.

[–] [email protected] -1 points 3 months ago (2 children)

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

[–] [email protected] 1 points 3 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 3 months ago* (last edited 3 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] 0 points 3 months ago (1 children)

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

[–] [email protected] 1 points 3 months ago

"show your work"

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