1. Expand (x + 1) using any method of choice. 2. Expand (x - 1) using any method of choice. 3. Add the expansions from the above two and comment on any observations you make. 4. Expand (x - 2y) 5. Write down 10 rows of the pascals triangle. Make 4-5 observations about pat- terns that you can make out from the numbers in the triangle. For example: the numbers along the two sides of the triangle are all 1