factrise x²+1/x+2-2x-2/x
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x² + 1/x² + 2 -2x -2/x
=(x)² + (1/x)² + 2.(x).(1/x) -2(x+1/x)
= (x+1/x)² -2(x+1/x)
= (x+1/x){(x+1/x)-2))}
= (x+1/x)(x+1/x-2)
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