Question

(x/y+y/x)(x/y-y/x) Find the product​

Answer 1

Answer:

=$( \frac{x}{y} + \frac{y}{x} )( \frac{x}{y} - \frac{y}{x} )$

=$( { \frac{x}{y} )}^{2} - ( { \frac{y}{x} )}^{2}$