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SOLUCIÓN

$\polyhornerscheme[x=2, resultstyle=\color{red},resultbottomrule,resultleftrule,resultrightrule]{x^4- 11x^3 + 42x^2 - 68x + 40}$

$\polyhornerscheme[x=2, resultstyle=\color{red},resultbottomrule,resultleftrule,resultrightrule]{x^3 -9x^2 +24x - 20}$

$\polyhornerscheme[x=2, resultstyle=\color{red},resultbottomrule,resultleftrule,resultrightrule]{x^2-7x+10}$

$\polyhornerscheme[x=2, resultstyle=\color{red},resultbottomrule,resultleftrule,resultrightrule]{x-5}$

Soluciones: $\textcolor{blue}{x=2}$ y $\textcolor{blue}{x=5}$