Factorise `x^(2)+(1)/(x^(2))-3`. – InterviewSolution

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1.	Factorise `x^(2)+(1)/(x^(2))-3`.
Answer» Given expression : `x^(2)+(1)/(x^(2))-3=x^(2)+(1)/(x^(2))-2-1=(x^(2)-2+(1)/(x^(2)))-1` `=(x-(1)/(x))^(2)-(1)^(2)=(x-(1)/(x)+a)(x-(1)/(x)-1)`

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