$$x^4 - 11x^3 + 42x^2 - 68x + 40 = 0$$
$$ \polyhornerscheme[x=2, resultstyle=\colorred,resultbottomrule,resultleftrule,resultrightrule]x^4- 11x^3 + 42x^2 - 68x + 40$$
$$ \polyhornerscheme[x=2, resultstyle=\colorred,resultbottomrule,resultleftrule,resultrightrule]x^3 -9x^2 +24x - 20$$
$$ (…)