\\begin{tikzpicture}[]
\\begin{axis}[
axis lines=middle,xtick={-2,-1,2,3},ytick=\\empty,xlabel={\\large $x$},ylabel={\\large $y$},
xmin=-3, xmax=4,ymin=-8.5,ymax=6,samples=500,enlargelimits=false]
\\addplot[name path=A,domain=-2.15:3.15,Navy,smooth] {x^3-x^2-6*x} node[above left] {$y=x^3-x^2-6x$};
\\path[name path=B] (axis cs:-1,0)--(axis cs:2,0);
\\addplot[draw,fill=DarkOrange!50!Yellow,opacity=.75] fill between[of=A and B,soft clip={domain=-1:2}];
\\end{axis}
\\end{tikzpicture}