a) $x^3-6x^2+11x-6$
$\polyhornerscheme[x=1,resultstyle=\colorred,resultbottomrule,resultleftrule,resultrightrule]x^3-6x^2+11x-6$
$\polyhornerscheme[x=2,resultstyle=\colorred,resultbottomrule,resultleftrule,resultrightrule]x^2-5x+6$ (…)