document.write( "Question 252554: If x^2 −3x − 21 = y and x^2 − 4x −18 = y , what is the product of\r
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Algebra.Com's Answer #184523 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
\"x%5E2-3x-21+=+y\" and \"x%5E2-4x-18+=+y\" , what is the product of
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document.write( "Since \"x%5E2-3x-21+=+y\" and \"x%5E2-4x-18+=+y\", then\r\n" );
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document.write( "\"x%5E2-3x-21+=+x%5E2-4x-18\", since both equal \"y\"\r\n" );
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document.write( "simplifying:\r\n" );
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document.write( "\"-3x-21=-4x-18\"\r\n" );
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document.write( "\"x=3\"\r\n" );
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document.write( "So therefore\r\n" );
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document.write( "\"y+=x%5E2-3x-21+=+3%5E2-3%283%29-21=9-9-21=-21\"\r\n" );
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document.write( "So you're asking how to write 240 in terms of -21?\r\n" );
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document.write( "One way would be \"240=%28-21%29%28-240%2F21%29+=+%28-21%29%2880%2F7%29\"\r\n" );
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document.write( "Somehow I think you're wanting something else, but I \r\n" );
document.write( "don't know what else.  Did you mistype something?\r\n" );
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document.write( "Edwin
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