199k views
0 votes
Coefficient of x^2 in expansion of (x+2)^5

User Fritzie
by
7.7k points

1 Answer

5 votes
The x² term will be C(5,2)x²·2³ = 80x².

The coefficient is 80.

_____
C(n, k) = n!/(k!·(n-k)!)
C(5, 2) = 5·4/(2·1) = 10
User Thomas Desdoits
by
8.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.