Question

X is equals to root 13 + 2 root 3 find the value of x minus one by X. And the answer is 52

Answer 1

your answer is wrong
according to your question.
because answer is of
(x+1/x)^2
and you have asked
(x-1/x)

x=√13+2√3

1/x= (1/√13+2√3)

After multiplying by (√13-2√3)/(√13-2√3)

we get

1/x=√13-2√3

x-1/x=√13+2√3-√13+2√3

=4√3
now the solution accordingly to your answer.
x+1/x=√13+2√3+√13-2√3
=2√13

(x+1/x)^2=2√13×2√13
=4×13=52

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Answer 2

Answer:

4 root 3

Step-by-step explanation:

hope it helps