Question

Please answer quickly.. need explanation also

Answer 1

Answer:

1/x=1/3+root8

=1/3+root8×3-root8/3-

root8

=3-root8/(3)^2-(root8)^2

=3-root8/9-8

=3-root8/1

x+1/x=3+root8+3-root8

=6

by taking square on both side

(x+1/x)^2=6^2

x^2+1/x^2+2×x×1/x=36

x^2+1/x^2+2=36

x^2+1/x^2=36-2

x^2+1/x^2=34

by taking square on both side

(x^2+1/x^2)^2=(34)^2

x^4+1/x^4+2×x^2×1/x^2=1156

x^4+1/x^4+2=1156

x^4+1/x^4=1156-2

x^4+1/x^4=1154