Comment on Conversing with Mathematicians

• JackbyDev@programming.dev ⁨1⁩ ⁨month⁩ ago

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

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  • sevenapples@lemmygrad.ml ⁨1⁩ ⁨month⁩ ago

    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.

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    • JackbyDev@programming.dev ⁨1⁩ ⁨month⁩ ago

      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.

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      • sevenapples@lemmygrad.ml ⁨1⁩ ⁨month⁩ ago

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

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  • Eheran@lemmy.world ⁨1⁩ ⁨month⁩ ago

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

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• ShrimpCurler@lemmy.dbzer0.com ⁨1⁩ ⁨month⁩ 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.

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• mexicancartel@lemmy.dbzer0.com ⁨4⁩ ⁨weeks⁩ ago

  Nope. To clarify, square roots are the opposite pf 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

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