notice, the divisor is x - 1, thus x - 1 = 0, thus x = 1
doing a quick synthetic division on it,
[tex]\bf \begin{array}{l|rrrrrr}
1&&6&13&1&-2\\
&&&6&19&20\\
--&&-&--&--&--\\
&&6&19&20&\boxed{18}&\impliedby remainder
\end{array}
\\\\\\
6x^2+19x+20[/tex]