document.write( "Question 149802: 1. Use synthetic division to divide the polynomial 2x^3 + 7x^2 – 5 by 3+x and write the quotient and the remainder\r
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document.write( "2. Consider the polynomial f(x)= 4x^4+5x^3 + 7x^2 – 34x+8\r
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document.write( "By using the Rational Zero Theorem, list all possible rational zeros of the given polynomial.\r
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document.write( " Find all of the zeros of the given polynomial. Show procedure
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Algebra.Com's Answer #109921 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! # 1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's simplify this expression using synthetic division\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Start with the given expression \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "First lets find our test zero:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so our test zero is -3\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now set up the synthetic division table by placing the test zero in the upper left corner and placing the coefficients of the numerator to the right of the test zero.(note: remember if a polynomial goes from
\n" ); document.write( "\n" ); document.write( "Start by bringing down the leading coefficient (it is the coefficient with the highest exponent which is 2)\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Multiply -3 by 2 and place the product (which is -6) right underneath the second coefficient (which is 7)\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Add -6 and 7 to get 1. Place the sum right underneath -6.\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Multiply -3 by 1 and place the product (which is -3) right underneath the third coefficient (which is 0)\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Add -3 and 0 to get -3. Place the sum right underneath -3.\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Multiply -3 by -3 and place the product (which is 9) right underneath the fourth coefficient (which is -5)\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " Add 9 and -5 to get 4. Place the sum right underneath 9.\r \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since the last column adds to 4, we have a remainder of 4. This means \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now lets look at the bottom row of coefficients:\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The first 3 coefficients (2,1,-3) form the quotient\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "and the last coefficient 4, is the remainder, which is placed over \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Putting this altogether, we get:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "which looks like this in remainder form:\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-----------------------------------\r \n" ); document.write( "\n" ); document.write( "Answer:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So the quotient is \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "# 2\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Any rational zero can be found through this equation\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So let's list the factors of 8 (the last coefficient):\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now let's list the factors of 4 (the first coefficient):\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now let's divide each factor of the last coefficient by each factor of the first coefficient\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now simplify\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "These are all the distinct rational zeros of the function that could occur\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b)\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now let's use synthetic division to test each possible zero:\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's make the synthetic division table for the function \n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Since the remainder \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "====================================\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since none of the possible rational roots are actual roots, this means that the polynomial either has irrational roots or complex roots.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |