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The real numbers x and y are such that

                                               \(\begin{align*} x + y &= 4, \\ x^2 + y^2 &= 22, \\ x^4 &= y^4 - 176 \sqrt{7}. \end{align*}\)

Find x-y

 Jun 13, 2020
 #1
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x - y = 8*sqrt(7)

 Jun 13, 2020

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