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Conversing with Mathematicians (mander.xyz)
submitted 3 months ago by fossilesque@mander.xyz to c/science_memes@mander.xyz
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[-] JackbyDev@programming.dev 15 points 3 months ago

The squareroot of 100 is ±10.

[-] OozingPositron@feddit.cl 8 points 3 months ago

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

[-] JackbyDev@programming.dev 15 points 3 months ago

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

[-] ShrimpCurler@lemmy.dbzer0.com 8 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.

[-] mexicancartel@lemmy.dbzer0.com 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

this post was submitted on 24 Jul 2024
356 points (100.0% liked)

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