Comment on teachings

Gemini24601@lemmy.world ⁨2⁩ ⁨years⁩ ago

• lugal@lemmy.ml ⁨2⁩ ⁨years⁩ ago

  You found the other

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  • uis@lemm.ee ⁨2⁩ ⁨years⁩ ago

    Now kiss

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    • Pringles@lemm.ee ⁨2⁩ ⁨years⁩ ago

      🎶 I was made for solving you baby 🎶

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• dankestnug420@lemmy.ml ⁨2⁩ ⁨years⁩ ago

  Sqrt(9)

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  • UnRelatedBurner@sh.itjust.works ⁨2⁩ ⁨years⁩ ago

    Uhm, actually 🤓☝️!

    Afaik sqrt only returns positive numbers, but if you’re searching for X you should do more logic, as both -3 and 3 squared is 9, but sqrt(9) is just 3.

    If I’m wrong please correct me, caz I don’t really know how to properly write this down in a proof, so I might be wrong here. :p
    (ps: I fact checked with wolfram, but I still donno how to split the equation formally)

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    • criitz@reddthat.com ⁨2⁩ ⁨years⁩ ago

      You’re correct. The square root operator only returns the principal root (basically, the positive one).

      So if x ^2^ = 9 then x = ±√9 = ±3

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      • UnRelatedBurner@sh.itjust.works ⁨2⁩ ⁨years⁩ ago

        Thanks, I haven’t connected the dots to that (±) sign and this problem.

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      • Routhinator@startrek.website ⁨2⁩ ⁨years⁩ ago

        Image

        Image

        So I checked this on my smartphone first, and thought maybe the software is just shit… So then I checked it on a Casio scientific calc, and both agree.

        -3^2 = -9… And 9 != -9

        … Are all the calculators somehow wrong? What’s the math rule I’m forgetting here…

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    • h3ndrik@feddit.de ⁨2⁩ ⁨years⁩ ago

      |x| = sqrt(…)

      would be correct.

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      • UnRelatedBurner@sh.itjust.works ⁨2⁩ ⁨years⁩ ago

        Cool! Makes sense to me. Honestly, I’ve never done it this way, but it’s so clean. Love it. Thanks.

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  • Evil_Shrubbery@lemm.ee ⁨2⁩ ⁨years⁩ ago

    Fund the sqrter!

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  • Kusimulkku@lemm.ee ⁨2⁩ ⁨years⁩ ago

    Sqrt

    hehe

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