Question

if t + 1/t = 5, find t^2 + 1/t^2

Answer 1

Answer:

23

Step-by-step explanation:

t + 1/t = 5

(t + 1/t)² = t² + 2(t)(1/t) + (1/t)²

5² = t²  + 2 + 1/t²

25 - 2 = t² + 1/t²

23 = t² + 1/t²