document.write( "Question 291911: If x = 3i is a root of the polynomial P(x) which has real coefficients, then what other root is guaranteed \n" ); document.write( "

Algebra.Com's Answer #210969 by richwmiller(17219) $\"\"$ $\"About$

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any zeros (roots) that are either complex(with i) or square roots come in plus and minus pairs.
\n" ); document.write( "x=-3i is also a root.
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