document.write( "Question 941828: the difference between a number and its reciprocal is 21/10. find the number.
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Algebra.Com's Answer #574383 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"N-1%2FN=21%2F10\"$
\n" ); document.write( "Multiply both sides by $\"10N\"$
\n" ); document.write( " $\"10N%5E2-10=21N\"$
\n" ); document.write( " $\"10N%5E2-21N-10=0\"$
\n" ); document.write( " $\"%282N-5%29%285N%2B2%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"2N-5=0\"$
\n" ); document.write( " $\"2N=5\"$
\n" ); document.write( " $\"N=5%2F2\"$
\n" ); document.write( "and
\n" ); document.write( " $\"5N%2B2=0\"$
\n" ); document.write( " $\"5N=-2\"$
\n" ); document.write( " $\"N=-2%2F5\"$
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