document.write( "Question 1162143: I NEED HELP WITH THE FOLLOWING QUESTION:
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\n" ); document.write( "function and verify the real zeros and the given function value. n=3 2 and
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Algebra.Com's Answer #785873 by Edwin McCravy(20064)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "If R is a zero then (x-R) is a factor\r\n" );
document.write( "If A+Bi is a zero, and the coefficients are real numbers, then A-Bi is\r\n" );
document.write( "also a solution.\r\n" );
document.write( "There is always a constant k which is a factor (it may be 1 understood but\r\n" );
document.write( "it may not be)\r\n" );
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document.write( "f(x) = k(x-2)(x-2i)(x+2i)\r\n" );
document.write( "f(x) = k(x-2)(x²-4i²)\r\n" );
document.write( "f(x) = k(x-2)(x²-4∙-1)\r\n" );
document.write( "f(x) = k(x-2)(x²+4)\r\n" );
document.write( "f(x) = k(x³+4x-2x²-8)\r\n" );
document.write( "f(x) = k(x³-2x²+4x-8)\r\n" );
document.write( "f(-1) = k[(-1)³-2(-1)²+4(-1)-8] = -15\r\n" );
document.write( "                 k[-1-2(1)-4-8] = -15\r\n" );
document.write( "                    k[-1-2-4-8] = -15\r\n" );
document.write( "                         k[-15] = -15\r\n" );
document.write( "                              k = 1\r\n" );
document.write( "f(x) = 1(x³-2x²+4x-8)\r\n" );
document.write( "f(x) = x³-2x²+4x-8        <--final answer\r\n" );
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document.write( "Here's the graph.  Scroll down to see it all.\r\n" );
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document.write( "Edwin
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