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If <img src="data:image/png;base64,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" class="Wirisformula" alt="fraction numerator x to the power of 2 end exponent plus x plus 1 over denominator x to the power of 2 end exponent plus 2 x plus 1 end fraction equals A plus fraction numerator B over denominator x plus 1 end fraction plus fraction numerator C over denominator left parenthesis x plus 1 right parenthesis to the power of 2 end exponent end fraction" width="265" height="43" style="vertical-align:-16px" role="math" data-mathml='«math xmlns=¨http://www.w3.org/1998/Math/MathML¨ »«mfrac»«mrow»«msup»«mrow»«mi»x«/mi»«/mrow»«mrow»«mn»2«/mn»«/mrow»«/msup»«mo»+«/mo»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«/mrow»«mrow»«msup»«mrow»«mi»x«/mi»«/mrow»«mrow»«mn»2«/mn»«/mrow»«/msup»«mo»+«/mo»«mn»2«/mn»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«/mrow»«/mfrac»«mo»=«/mo»«mi»A«/mi»«mo»+«/mo»«mfrac»«mrow»«mi»B«/mi»«/mrow»«mrow»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«/mrow»«/mfrac»«mo»+«/mo»«mfrac»«mrow»«mi»C«/mi»«/mrow»«mrow»«mo»(«/mo»«mi»x«/mi»«mo»+«/mo»«mn»1«/mn»«msup»«mrow»«mo»)«/mo»«/mrow»«mrow»«mn»2«/mn»«/mrow»«/msup»«/mrow»«/mfrac»«/math»'/> then A-B=

Solution for the question - if (x^(2)+x+1)/(x^(2)+2x+1)=a+(b)/(x+1)+(c)/((x+1)^(2)) then a-b= 4c+13c2