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Mathematics, 01.04.2021 18:40 small77

using cauchy theorem, find x:


\sf \displaystyle  \: 13 \sqrt{ {x}^{2} -  {x}^{4}  }  +   9\sqrt{ {x}^{2} +  {x}^{4}  }  = 16

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using cauchy theorem, find x:

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