If x is 2+ root 3 then find (x^2+1/x^2) (x^2-1/x^2)

Here  x=2−3–√ ……………………………………(1)

Hence  12−3√=12−3√⋅2+3√2+3√=2+3–√ (2)

From (1) and (2) we get  x+1x=4 ……………………………(3)

and  x−1x=−23–√ …………………….………(4)

From (3) and (4) we get  x2−1x2=(x+1x).(x−1x)=−83–√.

Hoped I helped

dont understand

step-by-step explanation:

answer: 48

just remember to use pemdas:

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