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$\frac{(x^2)2 - 4}{x^2 - 2} \ = K$
$\frac{(x^2 -2)(x + 2)}{x^2 - 2} \ = K$
x=$x^2 + 2 \ = K$
$\pm \sqrt{K - 2}$
raphael answered the question on January 16, 2017 at 12:38
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