document.write( "Question 845491: Find a polynomial function of lowest degree with rational coefficients and the following as some of its zeros.\r
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document.write( "A. –8, 5i\r
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document.write( "B. 5, − (square root)7, 1 + i
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Algebra.Com's Answer #509302 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Find a polynomial function of lowest degree with rational coefficients and the following as some of its zeros. \n" ); document.write( "A. –8, 5i \n" ); document.write( "If 5i is a zero and the coefficients must be rational, -5i is also a zero. \n" ); document.write( "-------------- \n" ); document.write( "f(x) = (x+8)(x-5i)(x+5i) = (x+8)(x^2+25) \n" ); document.write( "------------------------------------------------ \n" ); document.write( "B. 5, − (square root)7, 1 + i \n" ); document.write( "Same reason as above:: \n" ); document.write( "f(x) = (x-5)(x+sqrt(7))(x-sqrt(7))((x-1)-i)((x-1)+i) \n" ); document.write( "---- \n" ); document.write( "f(x) = (x-5)(x^2-7)((x-1)^2+1) \n" ); document.write( "---- \n" ); document.write( "f(x) = (x-5)(x^2-7)(x^2+2x+2) \n" ); document.write( "-------------------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "----------------------- \n" ); document.write( " \n" ); document.write( " |