Question

please do the answer

Answer 1

Q: Factorise :
${x}^{2} + \frac{1}{ {x}^{2} } - 3 \\ = > {x}^{2} + \frac{1}{ {x}^{2} } - 2 - 1 \\ = > {(x - \frac{1}{x} \: ) }^{2} - {1}^{2} \\ = > (x - \frac{1}{x} -1 )(x - \frac{1}{x} + 1)$