Question

If x= 3 +√8, then x2 + 1/x2 =?

Answer 1

hope the answer helps u

Answer 2

Answer:

x=3+√8

x²=(3+√8)²

x²=9+8+6√8

x²=17+6√8

1/x²=1/17+6√8

1/x²=17-6√8/17²+(6√8)²

1/x²=17-6√8/289-288

1/x²=17-6√8

x²+1/x²=17+6√8+17-6√8

x²+1/x²=34.