Big O notation question

Question

What is the upper bound for the function f(n)=2n³-2n².

Answer 1

2n³ - 2n² <= 2n³ , for all n >= 1
O(f(n)) = O(2n³) = O(n³)

Am I missing anything else?

Answer 2

It has cubic time/space complexity. Not sure if that was the question.

Answer 3

As the condition is 0<=f(n)<=g(n)

Answer 4

Yes you are correct for all n>=1 and c=2

Answer 5

Yes I know the answer but someone was contradicting this so I just want to confirm this

Answer 6

Thank you very much