Question

if x = 5 + 2 root 6 find the value of x square + 1 by x square and x cube + 1 by x cube

Answer 1

x=5+2 root 6
x²=(5+2 root 6)²
=25+24+20 root 6
=49+20 root 6
x²+1/x²=49+20 root 6+1/49+20 root 6
=49+20 root 6+49-20 root 6
=49+49
x²+1/x²=98

Answer 2

x²+1/x²=98
this is the answer to this question