document.write( "Question 838535: 120 less than the square of a number is the same as twice the number \n" ); document.write( "

Algebra.Com's Answer #505266 by LinnW(1048) $\"\"$ $\"About$

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120 less than the square of a number is the same as twice the number \r
\n" ); document.write( "\n" ); document.write( " $\"-120+%2B+x%5E2+=+2x+\"$
\n" ); document.write( "add -2x to each side
\n" ); document.write( " $\"+x%5E2+-2x+-120++=+0+\"$
\n" ); document.write( "We can factor
\n" ); document.write( " $\"+%28x+-+12%29%28x+%2B+10%29+=+0+\"$
\n" ); document.write( "Possible values for x are 12 and -10
\n" ); document.write( "For 12 , $\"-120+%2B+%2812%29%5E2+=+2%2812%29\"$
\n" ); document.write( " $\"-120+%2B+144+=+24\"$
\n" ); document.write( "This looks good so 12 works. \n" ); document.write( "

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