document.write( "Question 892833: Hi guys,\r
\n" ); document.write( "\n" ); document.write( "f(x)=x^2+2x+15
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\n" ); document.write( "\n" ); document.write( "I'm at a loss here, I know this should be really easy but after summer I'm at a loss for how to do this. If anyone has any help I'd really appreciate it,preferably with an explanation of the steps. Thanks in advance
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Algebra.Com's Answer #540825 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"f%28x%29=x%5E2%2B2x%2B15\"\r\n" );
document.write( "\r\n" );
document.write( "\"x%5E2%2B2x%2B15\"\"%22%22=%22%22\"\"%220%22\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-b+%2B-+sqrt%28+b%5E2-4ac+%29%29%2F%282a%29+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+sqrt%28+2%5E2-4%2A1%2A15+%29%29%2F%282%2A1%29+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+sqrt%284-60+%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+sqrt%28-56%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+i%2Asqrt%2856%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+i%2Asqrt%284%2A14%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+i%2Asqrt%284%29%2Asqrt%2814%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28-2+%2B-+i%2A2%2Asqrt%2814%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%282%28-1+%2B-+i%2Asqrt%2814%29%29%29%2F2+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"%28cross%282%29%28-1+%2B-+i%2Asqrt%2814%29%29%29%2Fcross%282%29+\"\r\n" );
document.write( "\r\n" );
document.write( "\"x\"\"%22%22=%22%22\"\"-1+%2B-+i%2Asqrt%2814%29+\"\r\n" );
document.write( "\r\n" );
document.write( "All complex numbers for which f(x)=0 are \"-1+%2B+sqrt%2814%29i+\", \"-1+-+sqrt%2814%29i+\", \r\n" );
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document.write( "Edwin
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