Visualize the graphical solutions to polynomial equations & inequalities.[br][br]Shaded area helps identify the portions of the graph that are positive ([math]f(x)>0[/math]) and negative ([math]f(x)<0[/math]). The graph itself is green for [math]f(x)>0[/math] and red for [math]f(x)<0[/math]. Corresponding intervals of the [math]x[/math]-axis are similarly colored.