if(x+1/x)=8, find x²+¹/x²
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(x+1/x )^2 =x^2+1/x^2+2
(8)^2-2 =x^2+1/x^2
62 =x^2+1/x2
(8)^2-2 =x^2+1/x^2
62 =x^2+1/x2
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