x^2+1/x^2+2-2x-2/x factorise this equation
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X²+1/x² +2 -2x-2/x
=(x+1/x)² - 2(x+1/x)
=(x+1/x)(x+1/x -2)
=(x+1/x)² - 2(x+1/x)
=(x+1/x)(x+1/x -2)
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