Question

(x+1 upon x) (x-1 upon x) =

Answer 1

To find :(x+1/x)(x-1/x)

By using identity (a+b)(a-b)=a^2-b^2

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

= x^2-1/x^2

Thanks!!!

Answer 2

(x+1/x)(x-1/x)=(a+b)(a-b)
(a+b)(a-b)=a^2-b^2
(x+1/x)(x-1/x)=x^2-1/x^2