This isn't as bad as you think. What does having a zero of a function mean? It means that inputting a certain value will output zero for the function. Let's say we have a quadratic with zeros of 2 and 3. In factored form, you could say that the zeros could be expressed by x-2 and x-3. If you wanted to put them together you could write it like (x-2)(x-3). Do you see how 2 and 3 are zeros? Now apply this same logic to your question.Originally Posted byjwaingold