What is the coefficient of x 9y 4 in the expansion of (2x + 3y) 13?

Question

asked Sep 24, 2019 94.9k views

1 Answer

ZhongYu · Answer 1 · 2019-09-29T16:10:50+0000

Answer:

29,652,480

Explanation:

The term of interest is ...

(13C9)(2x)^9·(3y)^4 = 715·512·81·x^9·y^4 = 29,652,480·x^9·y^4

The coefficient is 29,652,480.