the our which are ticked
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23 . solution:-
(x-1/x)^2= x^2+1/x^2-2ĂxĂ1/x
(x-1/x)^2=x^2+1/x^2-2
(x-1/x)^2=27-2
(x-1/x)^2=25
(x-1/x)= sqrt 25
(x-1/x) = 5
(x-1/x)^2= x^2+1/x^2-2ĂxĂ1/x
(x-1/x)^2=x^2+1/x^2-2
(x-1/x)^2=27-2
(x-1/x)^2=25
(x-1/x)= sqrt 25
(x-1/x) = 5
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