Question 1004663
x-5 as divisor means the root being checked is 5.

<pre>


5      |     5    6    -8    1
       |
       |         25   155   685  
       |_______________________________
             5   31   137   686

</pre>
The quotient means  {{{5x^2+31x+137+686/(x-5)}}};

Additionally this means  that the polynomial function evaluated at x=5 is  686.