document.write( "Question 121506: What tpye of polynomial sequence has a common difference at D2? Is it linear,quadratic,cubic, or quartic? \n" ); document.write( "
Algebra.Com's Answer #89164 by stanbon(75887)\"\" \"About 
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Quadratic
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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