Question

please solve the question given in the attachment ​

Answer 1

Answer:

(4) is the correct option

Step-by-step explanation:

(a + 1/a)(a - 1/a) + a² - 1/a²

use (a -b)(a + b) = a² - b²

a² - 1/a² + a² - 1/a²

= 2a² - 2/a²

= 2(a² - 1/a²)