Question

plz...................

Answer 1

x^2 + 1/x^2 = 51

On subtracting 2 from both sides, we get

=> x^2 + 1/x^2 - 2 = 51 - 2

=> x^2 + 1/x^2 - 2(x)(1/x) = 49

=> (x-1/x)^2 = 49

=> x - 1/x = 7

Answer 2

_-_-_-_✌$HEY \: \: MATE$✌_-_-_-_

________
________
$= > {x}^{2} + \frac{1}{{x}^{2} } = 51 \\ \\ = > {x}^{2} + \frac{1}{ {x}^{2} } - 2x \frac{1}{x} = 51 - 2x \frac{1}{x} \\ \\ = > {(x - \frac{1}{x}) }^{2} = 51 - 2 \\ \\ = > {(x - \frac{1}{x}) }^{2} = 49 \\ \\ = > x - \frac{1}{x} = \binom{ + }{ - } \sqrt{49} \\ \\ = > x - \frac{1}{x} = \binom{ + }{ - } 7$
_________________[ANSWER]

======================================

_-_-_-_☆$BE \: \: \: \: BRAILY$☆_-_-_-_