Question

if x is equal to 9 + 4 root 5 find the value of x square + 1 by x square​

Answer 1

Step-by-step explanation:

Given,

x=9+4√5

x^2+1/x^2= (9+4√5)^2+1/(9+4√5)^2

=> (9+4√5)^2= 581.992~||582||

=> 582+1/582= 583/582= 1.0017~||1||

Answer: 1

Hope it helps dear