Question

If x + 1/x = 5 , x^2 + 1/x^2 = ?​

Answer 1

Answer:

23

Step-by-step explanation:

(x + 1/x)² = x² + 1/x² + 2*x*1/x = x² + 1/x² + 2

5² = x² + 1/x² + 2

x² + 1/x² = 25 - 2 = 23