Week 5

In the beginning of this week I felt lost and completely confused.  As the week went on it started to kind of click in my head but it still was not completely there yet.  On Friday I started to feel more confident about the applied problems.  I know how to complete the square pretty well with these problems but I still do not understand how to use the X intercepts to figure out the problems.  I know it is a faster way so I would like to figure out that instead of having to write so much when completing the square.