document.write( "Question 1121240: How to find a polynomial function with rational coefficients so that p(x)=0 has the given roots 2+i and 1-sqrt5\r
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document.write( "I tried (x-(2+i))(x-(2-i))(x-(1-sqrt5))(x-(1+sqrt5)) and got x^4-6x^3+9x^2+6x-20, which does not seem to include 2+i as a root. Am I doing it right? \n" );
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Algebra.Com's Answer #737036 by ikleyn(52814)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "This step\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(x-(2+i))(x-(2-i))(x-(1-sqrt5))(x-(1+sqrt5))\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "was absolutely correct.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I did not check yours further expression, since it is just a technique you must do on your own.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |