document.write( "Question 1055572: form a third-degree polynomial function with real coefficients such that 3+i and -9 are zeros \n" ); document.write( "

Algebra.Com's Answer #670805 by Fombitz(32388) $\"\"$ $\"About$

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Polynomials with real coefficients always have complex roots in complex conjugate pairs so,
\n" ); document.write( " $\"f%28x%29=%28x-%283%2Bi%29%29%28x-%283-i%29%29%28x%2B9%29\"$
\n" ); document.write( " $\"f%28x%29=+%28x%5E2-6x%2B10%29%28x%2B9%29\"$
\n" ); document.write( " $\"f%28x%29=x%5E3%2B3x%5E2-44x%2B90\"$ \n" ); document.write( "

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