Stuck on Polynomial Division Problem Trying to find the quotient and remainder of the problem below..but keep getting to wrong. Could someone demonstrate how to solve this correctly?

Let's see.  In this division, i have used base $x$ and long division.  Unlike ordinary long division, i have taken the negative of the subtractions, and added them.  This is quicker when there are mixed signs involved.
The answer is read off as $x^4+x^3-2z^2-4x-6$ remainder $-9$
           (5)   (4)  (3)(2)  (1) (0)

                  1   1  -2   -4  -6    rem 9
          --------------------------       
    1, -2 )  1   -1  -4   0   2    3       
            -1    2
                  1  -4                        
                 -1   2
                 ======                    
                     -2    0
                      2   -4
                          -4    2
                           4   -8
                               -6  3
                                6 -12
                                   -9

      1    1  -2   -4   -6 
          -2  -2    4    8   12
                             -9   remainder
       1   1  -4    0    2    3

