A very common mistake when factoring an algebraic expression is to “forget the 1”. For example, consider the following factoring problem: Factor
We know that to factor means to write multiple terms as a single term or a product. So which is two terms becomes a product if we write
So where did the 1 come from in ? Probably the best way to answer this question is to realize the equation has to be reversible. What if were the original problem?
What I mean is, if we start with we get which was the original problem.