Question

Y=3–root8 then (y—1/y)2

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

x=3+√8 and y=3-√8

then,

(1/x)²+(1/y)²=( x²+y²)/(xy)²

and

using a²-b²=(a-b)(a+b);

={(9+8+6√8)+(9+8-6√8)}/(9-8)²

=34/1