Answer
$\ \ \ \ k^3\ -6k^2+11k-6$
Work Step by Step
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ k^2-4k+3$
$\underline{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ k-2}$
$\ \ \ \ \ \ \ \ \ -2k^2+8k-6\longrightarrow$ multiply by -2
$\underline{\ \ \ \ k^3\ -4k^2+3k\ \ \ \ \ \ \ }\longrightarrow$ multiply by k
$\ \ \ \ k^3\ -6k^2+11k-6\ \longrightarrow$ combine like terms