Question

विस्तार करा.

`(x + 1/x)(x - 1/x)`

Answer 1

`(x+1/x)(x-1/x)`

= `(x)^2 + {1/x + (-1/x)} x + (1/x) xx (-1/x)`

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

= `x^2 - 1/x^2`