Question

if x=4+√15,find the value of (x+1/x) to the power 2​

Answer 1

Step-by-step explanation:

(x +1 / x)²

= ((4+√15+1)/ 4+√15)²

= (5+√15/ 4+√15)²

= (25+ 15 + 10√15) / (16 + 15 + 8√15)

= (35+ 10√15) / ( 31 + 8√15)

hope this helps