Use a Graphing Calculator to Find a Viewing Window That $x$

Essay

Use a graphing calculator to find a viewing window that shows a complete graph of the given polynomial function(that is, a graph that includes all the peaks and valleys and indicates how the curve moves away frem the $x$ axis at thefar left and far right.) There are many possible correct answers.
- $f(x)=x^{4}-2 x^{3}-4 x^{2}+6 x+2$