Question

If x+ 1/x = 2 then x-1/x = ?

Answer 1

Step-by-step explanation:

x + 1/x = 2

Doing square both side

x² + 1/x² + 2 = 4

x² + 1/x² = 2

x² + 1/x² - 2 = 2 - 2

(x - 1/x)² = 0

x - 1/x = 0