factories the sum 1-2/x+x
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Step-by-step explanation:
1-(2/x)+x
=(1/x)(x-2+x^2)
=(1/x)(x^2+x-2)
=(1/x)(x^2+2x-x-2)
=(1/x){x(x+2)-1(x+2)}
=(1/x){(x+2)(x-1)}
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