Question 329485
{{{(5x^2-2x+1)-(Ax^2+Bx+C)=(8x^2-x+3)}}}
{{{5-A=8}}}
{{{A=3}}}
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{{{-2-B=-1}}}
{{{B=-1}}}
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{{{1-C=3}}}
{{{C=-2}}}
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Subtract {{{3x^2-x-2}}} from {{{5x^2 -2x +1}}} to get {{{8x^2-x+3}}}.