Question

If x^2 +1 /X^2 = 51, find x-1 / x

Answer 1

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Answer 2

x^2 plus 1/x^2 --51 then,( x - 1/ x ) square -- x^2 plus 1/ x^2 -2 *x*1/x (x-1/x) square -- 51-2 (x- 1/x) square -- 49 then, (x - 1/x) -- 7