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 (3 children)

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

[–] JackbyDev 17 points 3 months ago (2 children)

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

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

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

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

That's not how the square root is defined.

You're confusing "square root of 100" with "the answer to x^2 = 100". These are different things.

[–] JackbyDev 3 points 3 months ago (1 children)

Which is why I differentiated between square roots and the principle square root by saying the square roots instead of the square root on the second comment.

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

so you came up with your own term to cover your mistake?

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

Nope, everything they said is well established and correct

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

Oops, my bad

[–] JackbyDev 2 points 3 months ago

No, I was being pedantic to appease the pedantic assholes.

[–] [email protected] 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.

[–] [email protected] 1 points 2 months ago* (last edited 2 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