document.write( "Question 947522: P(x) = 3x^3 + x2 − 7x − 5 What are all possible rational zeros of P given by the Rational Zeros Theorem? \n" ); document.write( "
Algebra.Com's Answer #578211 by Theo(13342)![]() ![]() You can put this solution on YOUR website! the rational roots are all the possible factors of p divided by q after you have reduced that fraction to simplest terms.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "p is the constant term. \n" ); document.write( "q is the leading coefficient.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "your p is equal to 5 \n" ); document.write( "your q is equal to 3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the possible factors of 5 are 1,5 \n" ); document.write( "the possible factors of q are 1,3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the possible factors of p/q are 1/1, 1/3, 5/1, 5/3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the possible rational roots are plus or minus the possible factors of p/q.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "as it turns out, the roots are x = -1 and x = 5/3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a graph of the equation is shown below:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " ![]() \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "1.667 shown on the graph is equal to 1 and 2/3 which is equal to 5/3.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the solution of x = -1 is actually encountered twice, so the factors of the equation are:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "(x+1) * (x+1) * (x-5/3) = 0\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "if you multiply those factors out, you will get back to the original equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so you have 3 rational roots to the equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-1 is encountered twice and 5/3 is encountered once.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |