Answer
Step 1: $y=x^3$.
Step 2: $x=-4,-2,0$, $y=0$,
Step 3: $x=-4,-2,0$ (multiplicity 1, crosses the x-axis).
Step 4: $2$
Step 5: See graph.
Work Step by Step
Step 1: For $f(x)=x(x+2)(x+4)$, we can determine the end behavior of the graph as similar to $y=x^3$.
Step 2: We can find the x-intercept(s) (let $y=0$) $x=-4,-2,0$, y-intercept(s) (let $x=0$) $y=0$,
Step 3: We can determine the zero(s) $x=-4,-2,0$ (multiplicity 1, crosses the x-axis).
Step 4: We can determine the maximum number of turning points $n-1=3-1=2$
Step 5: See graph.
