Question

please solve this for me

Answer 1

Here,
x=3+2√2
Then,
x+1/x
=3+2√2+1/3+2√2
=9+8+1/3+2√2
=18/3+2√2
therefore,
x+1/x=18/3+2√2(when x=3+2√2)

Hope this may help you.Thank you.