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A Very Simple Problem

Algebra Level 1

$x^{2} - y^{2} = 7$
$z = x^{y}$
$x^{2} + y^{2} = 25$
$t = \frac{x}{y}$

Find the value of $z$ .

3 4/3 7 64

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by Ananth Jayadev

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