Question

solve it on ur notebook please answer is 322

Answer 1

Answer:

Step-by-step explanat$X=9+4\sqrt5\\ X=4*\sqrt5+9\\ X^2+1/X^2\\(4*\sqrt5+9)^2+1/(4*\sqrt5+9)^2\\(72*\sqrt5+3^4+80)+1/(72*\sqrt5+3^4+80)\\72*\sqrt5+161+(-72*\sqrt5-161)\\0$