Answer:
Zeros: -2, 1, -1
Multiplicity of each zero is 1
The graph crosses the x-axisat each zero.
Step-by-step explanation:
Consider the polynomial function

First, factor this function:

The zero of the function is such value of x at which f(x)=0. Note that f(x)=0 when

This is possible when

Therefore, the function f(x) has three zeros. Each zero is of multiplicity 1 (because each factor has 1st degree)
This means that at each zero the function will crosss the x-axis. (The function will touch the x-axis at its zero when this zero has even multiplicity)