document.write( "Question 816274: Can you please help me solve this with the Quadratic Equation?
\n" ); document.write( "x^2+39x+360=0\r
\n" ); document.write( "\n" ); document.write( "When I tried it, I came up with -39 +/- sqrt(1521-56160)
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Algebra.Com's Answer #491456 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "x²+39x+360 = 0\r\n" );
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document.write( "It can be factored:\r\n" );
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document.write( "(x+24)(x+15) = 0\r\n" );
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document.write( "x+24=0;  x+15=0\r\n" );
document.write( "  x=-24;    x=-15\r\n" );
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document.write( "But you could have solved it using the quadratic formula.\r\n" );
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document.write( "You got the quadratic formula wrong and used b²-4bc instead of b²-4ac.\r\n" );
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document.write( "\"x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\" \r\n" );
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document.write( "\"x+=+%28-39+%2B-+sqrt%28+39%5E2-4%2A1%2A360+%29%29%2F%282%2A1%29+\"\r\n" );
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document.write( "\"x+=+%28-39+%2B-+sqrt%281521-1440+%29%29%2F2+\"\r\n" );
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document.write( "\"x+=+%28-39+%2B-+9%29%2F2+\"\r\n" );
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document.write( "Using the +\r\n" );
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document.write( "\"x+=+%28-39+%2B+9%29%2F2+\"\r\n" );
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document.write( "\"x+=+%28-30%29%2F2+\"\r\n" );
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document.write( "x = -15   \r\n" );
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document.write( "Using the -\r\n" );
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document.write( "\"x+=+%28-39+-+9%29%2F2+\"\r\n" );
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document.write( "\"x+=+%28-48%29%2F2+\"\r\n" );
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document.write( "x = -24   \r\n" );
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document.write( "Edwin
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