Answer: 243x^5 + 2025x^4y + 6750x^3y^2 + 11250x^2y^3 + 9375xy^4 + 3125y^5
Explanation:
1. To find each term, use BINOMIAL EXPANSION THEOREM (best to look up theorem on your own).
2. Expand the summation (after finding each term).
3. Simplify the exponents for each term.
> 1 • (3x)^5 • (5y)^0 + 5 • (3x)^4 • (5y)^1 + . . . + 1 • (3x)^0 • (5y)^5
4. Simplify.