document.write( "Question 41624: Given that one zero of P(x) = x3 + 3x2 + 7x + 85 is 1 + 4i, which of the following is also a zero of P(x)?
\n" ); document.write( "(1) -1 + 4i (3) 4 + i
\n" ); document.write( "(2) 1 - 4i (4) -4 + i \n" ); document.write( "

Algebra.Com's Answer #26909 by venugopalramana(3286) $\"\"$ $\"About$

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Given that one zero of P(x) = x3 + 3x2 + 7x + 85 is 1 + 4i, which of the following is also a zero of P(x)?
\n" ); document.write( "(1) -1 + 4i (3) 4 + i
\n" ); document.write( "(2) 1 - 4i (4) -4 + i
\n" ); document.write( "THE GIVEN EQN.HAS REAL COEFFICIENTS.HENCE IF THERE IS ONE COMPLEX ROOT ITS CONJUGATE SHOULD ALSO BE A ROOT.
\n" ); document.write( "SO IF 1+4I IS A ROOT THEN 1-4I SHOULD ALSO BE A ROOT \n" ); document.write( "

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