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    Does anyone know what the 'i' is in the answer displayed by some Casio calculators?

    The answer to one question I'm doing is 52.5+25.69857324i, does anyone know how to convert that to a decimal? I remember going over it when I did A Level maths, but that was many years ago now.

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    (Original post by neil_s)
    Does anyone know what the 'i' is in the answer displayed by some Casio calculators?

    The answer to one question I'm doing is 52.5+25.69857324i, does anyone know how to convert that to a decimal? I remember going over it when I did A Level maths, but that was many years ago now.

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    i is presumably the square root of -1 in this instance. You clearly have an equation with no real roots or at least one none real.
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    Sounds about right to be fair, it was for a solution to a quadratic lagrangian, it's been seven pages of algebra so far. All good fun!
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      (Original post by neil_s)
      it's been seven pages of algebra so far.
      fuarrk
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      (Original post by neil_s)
      The answer to one question I'm doing is 52.5+25.69857324i, does anyone know how to convert that to a decimal?
      It is a decimal!
     
     
     
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