document.write( "Question 1054384: Hi, im really having trouble with this one question since i have missed the class this was taught. i would really appreciate the help!\r
\n" ); document.write( "\n" ); document.write( "Question: Find a FOURTH DEGREE polynomial f(x) with real coefficients that has roots of : -2, 1, and 3i with f(3)= -12\r
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Algebra.Com's Answer #669612 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
Polynomials with real solutions, if they have a complex root, they also have the complex conjugate as a root.
\n" ); document.write( "So since \"x=3i\" is a root, \"x=-3i\" is also a root.
\n" ); document.write( "So forming the solution polynomial,
\n" ); document.write( "\"f%28x%29=a%28x%2B2%29%28x-1%29%28x-3i%29%28x%2B3i%29\"
\n" ); document.write( "\"f%28x%29=a%28x%5E2%2Bx-2%29%28x%5E2%2B9%29\"
\n" ); document.write( "\"f%28x%29=a%28x%5E4%2Bx%5E3%2B7x%5E2%2B9x-18%29\"
\n" ); document.write( "Solve for \"a\" using the given value.
\n" ); document.write( "\"f%283%29=a%283%5E4%2B3%5E3%2B7%283%29%5E2%2B9%283%29-18%29=-12\"
\n" ); document.write( "\"f%283%29=a%28180%29=-12\"
\n" ); document.write( "\"a=-12%2F180\"
\n" ); document.write( "\"a=-1%2F15\"
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\n" ); document.write( "\"f%28x%29=%28-1%2F15%29%28x%5E4%2Bx%5E3%2B7x%5E2%2B9x-18%29\"
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