document.write( "Question 1136890: Zeros of Functions\r
\n" ); document.write( "\n" ); document.write( "Find an nth degree polynomial function with real coefficients such that:\r
\n" ); document.write( "\n" ); document.write( "n=3
\n" ); document.write( "1 and i are zeros
\n" ); document.write( "f(-1)=8
\n" ); document.write( "

Algebra.Com's Answer #754728 by Alan3354(69443)\"\" \"About 
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Find an nth degree polynomial function with real coefficients such that:\r
\n" ); document.write( "\n" ); document.write( "n=3
\n" ); document.write( "1 and i are zeros
\n" ); document.write( "f(-1)=8
\n" ); document.write( "----------
\n" ); document.write( "Zeroes are 1, i & -i
\n" ); document.write( "--> (x-1)*(x^2 + 1) = x^3 - x^2 + x - 1
\n" ); document.write( "---------
\n" ); document.write( "f(-1) = -1 - 1 - 1 - 1 = -4
\n" ); document.write( "Multiply by -2
\n" ); document.write( "--> f(x) -2x^3 + 2x^2 - 2x + 2
\n" ); document.write( "============
\n" ); document.write( "f(-1) = 2 + 2 + 2 + 2 = 8
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