Question

x is equal to 3 + under root 8 and Y is equal to 3 minus under root 8 then 1 / X square + 1 / Y square is equal to

Answer 1

the answer is
$1 \div {(3 + \sqrt{8)} }^{2} + 1 \div {(3 - \sqrt{8)} }^{2}$
9+9+8+8=34