document.write( "Question 899365: Please help me. How to get all the zeros of this polynomial function f(x)=x^3+2x^2-22x \n" ); document.write( "
Algebra.Com's Answer #545338 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
How to get all the zeros of this polynomial function
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document.write( "    \"%22f%28x%29%22\"\"%22%22=%22%22\"\"x%5E3%2B2x%5E2-22x\"\r\n" );
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document.write( "           \"x%5E3%2B2x%5E2-22x\"\"%22%22=%22%22\"\"%220%22\"\r\n" );
document.write( "           \"x%28x%5E2%2B2x-22%29\"\"%22%22=%22%22\"\"%220%22\"\r\n" );
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document.write( "Use the zero-factor property:\r\n" );
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document.write( "     \"x+=+0\"     \"x%5E2%2B2x-22\"\"%22%22=%22%22\"\"%220%22\"\r\n" );
document.write( "                         \"x+=+%28-b+%2B-+sqrt%28+b%5E2-4ac+%29%29%2F%282a%29+\"\r\n" );
document.write( "                         \"x+=+%28-%282%29+%2B-+sqrt%28+%282%29%5E2-4%281%29%28-22%29+%29%29%2F%282%281%29%29+\"\r\n" );
document.write( "                         \"x+=+%28-2+%2B-+sqrt%284%2B88%29%29%2F2+\"\r\n" );
document.write( "                         \"x+=+%28-2+%2B-+sqrt%2892%29%29%2F2+\"\r\n" );
document.write( "                         \"x+=+%28-2+%2B-+sqrt%284%2A23%29%29%2F2+\" \r\n" );
document.write( "                         \"x+=+%28-2+%2B-+2sqrt%2823%29%29%2F2+\"\r\n" );
document.write( "                         \"x+=+%282%28-1+%2B-+sqrt%2823%29%29%29%2F2+\"\r\n" );
document.write( "                         \"x+=+%28cross%282%29%28-1+%2B-+sqrt%2823%29%29%29%2Fcross%282%29+\"\r\n" );
document.write( "                         \"x+=+-1+%2B-+sqrt%2823%29+\"\r\n" );
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document.write( "f(x) has three zeros :\r\n" );
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document.write( "Edwin
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