The discussion revolves around the application of the Binomial Theorem to expand the expression (3n+1)^3. Participants are exploring the correctness of the expansion and the proper use of exponents in the binomial expansion.
There is an ongoing examination of the original poster's expansion attempt, with some participants providing feedback on the errors identified. While corrections are suggested, there is no explicit consensus on the correct method yet, as the discussion is still unfolding.
Participants note that the original poster is a beginner, which may influence their understanding of the Binomial Theorem and its application. There is also mention of potential typos in the original expression.
??Your exponents should go from 3 down to 0.
This is also not correct.
Perhaps it is a typo but you should not have "^2" twice.Natasha1 said:
You have added 3(3n)^2 and 3(2n)^2 but the second shouldn't be squared.