document.write( "Question 131211: Two numbers have a product of 80. Their sum is 21. What are the numbers? \n" ); document.write( "
Algebra.Com's Answer #95796 by checkley71(8403)\"\" \"About 
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X+Y=21 OR X=21-Y
\n" ); document.write( "X*Y=80
\n" ); document.write( "(21-Y)Y=80
\n" ); document.write( "21Y-Y^2-80=0
\n" ); document.write( "-Y^2+21Y-80=0
\n" ); document.write( "Y^2-21+80=0
\n" ); document.write( "(Y-15)(Y-6)=0
\n" ); document.write( "Y-15=0
\n" ); document.write( "Y=15 ANSWER.
\n" ); document.write( "Y-6=0
\n" ); document.write( "Y=6 ANSWER.
\n" ); document.write( "15+6=21
\n" ); document.write( "15*6=80
\n" ); document.write( "80=80
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