I'm not sure what you mean by "there is 3 of them"...?
The "zeroes" are the values for x that make the polynomial equal to zero. If they are real numbers, then they are also where the polynomial crosses or touches the x-axis.
The "multiplicity" is "how often they occur". For instance, (x - 3)<sup>2</sup> has a zero of x = 3, with multiplicity two, because the factor x - 3 occurs twice.
Note that, if x = a is a zero, then you solved x - a = 0 to find it, which means that x - a was a factor. Use this to work backwards from the zeroes to the factors. Use the multiplity information to find out how many times the factors appear. Then multiply together all the factors to find the polynomial.
Eliz.