document.write( "Question 1209715: Let P(x) be a polynomial of the form
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document.write( "P(x) = 2x^3 + ax^2 - 23x + c,
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document.write( "such that 12 and 7 are roots of P(x). What is the third root?\r
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document.write( "For the polynomial in part (a), compute the ordered pair (a,c). \n" );
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Algebra.Com's Answer #851882 by mccravyedwin(408) You can put this solution on YOUR website! \r\n" ); document.write( " Go to https://www.wolframalpha.com/\r\n" ); document.write( "\r\n" ); document.write( "Type in: 2*7^3 + a*7^2-23*7 + c = 0, 2*12^3 + a*12^2 - 23*12 + c = 0\r\n" ); document.write( "\r\n" ); document.write( "Press ENTER\r\n" ); document.write( "\r\n" ); document.write( "Get a = -531/19, c= 16044/19.\r\n" ); document.write( "\r\n" ); document.write( "So you have the second part of the problem (a,c) = (-531/19, 16044/19)\r\n" ); document.write( "\r\n" ); document.write( "Now erase what you typed in before.\r\n" ); document.write( "\r\n" ); document.write( "Type in: 2x^3 + ax^2 - 23x + c = 0, a = -531/19, c= 16044/19\r\n" ); document.write( "\r\n" ); document.write( "Press ENTER\r\n" ); document.write( "\r\n" ); document.write( "See the third root: x = -191/38\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |