Question

Explain, in complete sentences, how you would expand (6x + 5y)3 using Pascal's Triangle.

Answer 1

The coefficients of a binomial expansion are the same as the nth line of Pascal's Triangle. For example, the "third" line of Pascal's Triangle is 1 3 3 1. We also have (a+b)^3=1a^3+3a^2b^1+3a^1b^2+1b^3