document.write( "Question 959556: 7x^3-62x^2+167x-102, 4-i is a zero
\n" ); document.write( "a, find all the zeros
\n" ); document.write( "b,factor f(x)as a product of linear factors
\n" ); document.write( "c,solve the equation f(x)=0
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Algebra.Com's Answer #586526 by MathLover1(20850)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "a. find all the zeros\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=7x%5E3-62x%5E2%2B167x-102\",
\n" ); document.write( "if \"4-i+\"is a zero, then \"4%2Bi\" is a zero\r
\n" ); document.write( "\n" ); document.write( "using zero product formula we have \"%28x-%284-i%29%29%28x-%284%2Bi%29%29\"=>\"x%5E2-8x%2B17\"\r
\n" ); document.write( "\n" ); document.write( "now we need to use long division and divide \"7x%5E3-62x%5E2%2B167x-102\" by \"x%5E2-8x%2B17\"\r
\n" ); document.write( "\n" ); document.write( "--------------\"7x-6\"
\n" ); document.write( "\"x%5E2-8x%2B17\"|\"7x%5E3-62x%5E2%2B167x-102+\"
\n" ); document.write( "-------------\"7x%5E3-56x%5E2%2B119x\"
\n" ); document.write( "----------------.....\"-6x%5E2%2B48x-102\"
\n" ); document.write( "---------------......\"-6x%5E2%2B48x-102\"
\n" ); document.write( "---------------.............................\"0\" =>reminder
\n" ); document.write( "so, third zero is \"7x-6\", and the product of all zeros is:\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%287x-6%29%28x-%284-i%29%29%28x-%284%2Bi%29%29\" or
\n" ); document.write( "\"f%28x%29=%287x-6%29+%28x%5E2-8x%2B17%29\"\r
\n" ); document.write( "\n" ); document.write( "b. factor \"f%28x%29\" as a product of linear factors\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=7x%5E3-62x%5E2%2B167x-102\"...write \"-62x%5E2\" as \"-56x%5E2-6x%5E2\" and \"167x\" as \"119x%2B48x\"
\n" ); document.write( "\"f%28x%29=7x%5E3-56x%5E2-6x%5E2%2B119x%2B48x-102\"......group
\n" ); document.write( "\"f%28x%29=%287x%5E3-6x%5E2%29-%2856x%5E2-48x%29%2B%28119x-102%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=x%5E2%287x-6%29-8x%287x-6%29%2B17%287x-6%29\"\r
\n" ); document.write( "\n" ); document.write( "\"f%28x%29=%287x-6%29%28x%5E2-8x%2B17%29\"\r
\n" ); document.write( "\n" ); document.write( "c. solve the equation \"f%28x%29=0\"\r
\n" ); document.write( "\n" ); document.write( "\"%287x-6%29%28x%5E2-8x%2B17%29=0\" or like we have in a.\"%28x%5E2-8x%2B17%29=%28x-%284-i%29%29%28x-%284%2Bi%29%29\"\r
\n" ); document.write( "\n" ); document.write( "\"%287x-6%29%28x-%284-i%29%29%28x-%284%2Bi%29%29=0\"\r
\n" ); document.write( "\n" ); document.write( "solutions:\r
\n" ); document.write( "\n" ); document.write( "\"%287x-6%29=0\"=>\"7x=6\"=>\"x=6%2F7\"
\n" ); document.write( "and two already given zeros
\n" ); document.write( "\"%284-i%29\"
\n" ); document.write( "\"%284%2Bi%29\"\r
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