• Deebster
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    964 months ago

    When all you have is an imaginary hammer, everything looks like a rotation around the imaginary unit circle.

    Explanation of maths

    x = -10, i = √-1 so i² = -1 and 10i²=-10

        • @[email protected]
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          -34 months ago

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

            • @Eheran
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              14 months ago

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

          • @[email protected]
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            84 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]
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            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

    • @bi_tux
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      154 months ago

      yes, it is

  • @iAvicenna
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    274 months ago

    that is a very long way to write -10

      • @jacksilver
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        64 months ago

        Yeah, I think the point is that the person answering was wrong/over complicating. If x=10i, then x^2 would be -100 (or potentially -10 depending on what you think the ^2 is applied to).

        • @Khanzarate
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          224 months ago

          They said x=10i^2, not 10i. Difference is it equals -10, and they chose not to simplify.

        • @[email protected]
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          44 months ago

          They’re correct, it’s just overcomplicated as fuck in ways that are correct but completely irrelevant to the question.

      • @[email protected]
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        44 months ago

        Depends on what are the allowed values for x are. Real numbers, complexe numbers, binary or I made up my own numbers ;)

  • @[email protected]
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    94 months ago

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

    • @[email protected]
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      14 months ago

      Unless I was in that clas where we had to write mathematical proofs. I HATED those. Sure, you solved the question but write out this complicated reason for why your answer is the correct answer.