Question

please solve my problem

Answer 1

your ans

_________


given:-

(x/y-y/x)2

now apply

(a-b)2=a2+b2-2ab

so

(x/y-y/x)2=x2/y2+y2/x2+2×x/y×y/x

(x/y-y/x)2=x2/y2+y2/x2-2

___________

Answer 2

${( \frac{x}{y} - \frac{y}{x} ) }^{2} \\ {( \frac{ {x}^{2} - {y}^{2} }{xy} ) }^{2} \\ \frac{( {{x}^{2} - {y}^{2}) }^{2} }{ {(xy)}^{2} } \\ \frac{ {x}^{4} - {2 {(xy) } }^{2} + {y}^{4} }{ {(xy)}^{2} }$