$x-\frac{1}{x}=2$ if $x^2+\frac{1}{x^2}=?$

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$x-\frac{1}{x}=2$ ആയാൽ $x^2+\frac{1}{x^2}=?$

A10

Answer:

if x-1/x =k then x²+ 1/x² = k² + 2 here k=2 then k²+2 = 2²+2 = 6

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