Algebra.Com's Answer #183919 by drk(1908)![\"\"](\"/images/stars/stars-12.gif\")  
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To solve this problem, we want to use polynomial division. On the outside you will write  and on the inside you will write  . Notice that there is a 0x^2. This is because we jumped over the x^2 term. Now we are ready to divide. \r
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document.write( "In the first division run through, we place an x above the x^3 term. By distributive property, we get  . Now by subtraction, your new level of terms is  . Bring down the -12k and redivide. This time we place a 3 above the 0x^2 term and distribute as before to get
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document.write( " . This subtracts nicely to get -28x + 4kx. The remainder must be zero, so
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document.write( "-28x - 4kx = 0. K = -7. \n" );
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