I need help with the following problem:

Question

I need help with the following problem:
f(n) = n^2 + 4n is O(n^2)

Reiny · Answer

Are you the same person who asked this question earlier today?? http://www.jiskha.com/display.cgi?id=1207150648

Arturo · Answer

Perhaps we are in the same class.

Count Iblis · Answer

http://www.jiskha.com/display.cgi?id=1207186401