Question

please answer correctly​

Answer 1

Took me a while lol.

x - 1/x = 9

Square on both sides:

(x - 1/x)² = 81

x² - 2(x)(1/x) + 1/x² = 81

x² - 2 + 1/x² = 81

x² + 1/x² = 81 + 2

x² + 1/x² = 83