document.write( "Question 184870: If you subtracr a number from its square, the result is 12 Find all such numbers\r
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Algebra.Com's Answer #138718 by Earlsdon(6294)\"\" \"About 
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Let the number be n, so...
\n" ); document.write( "\"n%5E2-n+=+12\" Subtract 12 from both sides.
\n" ); document.write( "\"n%5E2-n-12+=+0\" Factor this quadratic equation.
\n" ); document.write( "\"%28n%2B3%29%28n-4%29+=+0\" Apply the zero product rule.
\n" ); document.write( "\"n%2B3+=+0\" or \"n-4+=+0\" therefore:
\n" ); document.write( "\"n+=+-3\" or \"n+=+4\"
\n" ); document.write( "Check:
\n" ); document.write( "\"%28-3%29%5E2-%28-3%29+=+12\"
\n" ); document.write( "\"9%2B3+=+12\"
\n" ); document.write( "\"12+=+12\" OK!
\n" ); document.write( "\"4%5E2-4+=+12\"
\n" ); document.write( "\"16-4+=+12\"
\n" ); document.write( "\"12+=+12\" OK!
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