Question

Urgent plzzzzzz telll. . . . .

Answer 1

given :x=3+root8
1/x=1/3+root8 *3-root 8
=3-root 8/9-8
so, 1/x= 3-root 8
now,
x+1/x = 3+root8+3-root8
=6
according to question
(x+1/x)2 =x2 +1/x2+2
= (x+1/x)2-2
=36-2
=34
x=(3+root8