tion $10$

Having wrapped up your work on the smaller projects, you are finally able to turn your attention to the project you are most excited about: research! Being one of Casey's projects, the files needed are password protected. Once again, you review the hint that Casey has left as a reminder of the password. Find an exact solution for

$ln(4)+ln(4x^2-2)=ln(73)$

If there is no solution, enter NA$.$ If there are multiple solutions, they should be separated by semicolons $($e$.$g$.2$;$4$;$6$ or $x+1$;$x-1).$

$x=$

$$