Question

If x=1+√2 find the value of x²+1/x²

Answer 1

answer is : 1 + 1/(3+2(2)^1/2)

Answer 2

X^2=3+√2
1/x^2=(3-√2)/7
X^2+1/x^2=(21+7√2+3-√2)/7
=(24+6√2)/7