max015/T11/gpt_answer/temp1.md

To determine the complexity of the given expression, we need to analyze the number of operations it performs.

The expression is: 5n + 10n^2 = O(n^2)

In this expression, there are two terms: 5n and 10n^2. The term with the highest power of n dominates the complexity, which in this case is 10n^2.

Since the highest power of n is n^2, the complexity of the expression is O(n^2).

Therefore, the statement is true.