11. Sketch a graph of the polynomial function described. fis increasing when -2 < x < 0 and x > 2;f is
decreasing when x < -2 and 0 < x < 2.
f(x) > 0 when x < -3, -1 3;
f(x) < 0 when -3 < x < -1 and 1 < x < 3.
one