document.write( "Question 839856: The square of a number is equal to the sum of 21 and 4 times the number. Find the number \n" ); document.write( "

Algebra.Com's Answer #506029 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"N%5E2=21%2B4N\"$
\n" ); document.write( " $\"N%5E2-4N-21=0\"$
\n" ); document.write( " $\"%28N-7%29%28N%2B3%29=0\"$
\n" ); document.write( "Two solutions:
\n" ); document.write( " $\"N-7=0\"$
\n" ); document.write( " $\"N=7\"$
\n" ); document.write( "and
\n" ); document.write( " $\"N%2B3=0\"$
\n" ); document.write( " $\"N=-3\"$
\n" ); document.write( " \n" ); document.write( "

\n" );