Solve :
$(x^{2} - 2 n)^{2} - 23 (x^{2} - 2 n) + 132 = 0$

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Solution

Put $x^{2} - 2 x = t$
$\Rightarrow t^{2} - 23 + 132 = 0$
$t = 11, 12$
$x^{2} = 11 + 2 n$ (or) $12 + 2 n$

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