Outcomes
        In this lesson you will 
        - Discover the pattern necessary to generate Pascal's triangle. 
- Explore various properties of Pascal's triangle. 
- Relate the elements of Pascal's Triangle to combinations expressions. 
By the end of this section you should be able to: 
        - Demonstrate an understanding of binomial expansion and its connection to combinations. 
- Connect Pascal's triangle with combinatorial coefficients. 
Introduction
        In this section you will apply what you have learned about combinations to help you expand expressions such as (x + y)n without performing polynomial multiplication.
        This section should take you about 2.5 hours to complete.
        Prerequisites
        To be successful in this lesson, it would be helpful to know the following: 
        
        - Combinations. 
- The idea of symmetric patterns.