Factors and zeroes of a function, or graph, have a connection. If a graph has a zero at 3, then one of the graphs factors will be (x-3), because (3-3)=0. Also, if there is a non-easy zero, then you will have to use some form of division to factor out the rest of the equation. If the equation that needs to be factored, is x^4-x^3-9x^2+3x+18, there will be easy zeroes at -2 and 3. You will then divide the equation by both factors, synthetically, or by long division. Once you have done this, you find the other factor is (x^2-3), and the zero would be the square root of 3. The degree of the polynomial will determine the amount of zeroes. However, this does not affect the number of factors, because in the last example, there were only 3 factors, and the degree was 4.