1. **State the problem:** Factorize the expression $n^2 - 2n$. 2. **Identify common factors:** Both terms $n^2$ and $-2n$ have a common factor of $n$. 3. **Factor out the common factor:** $$n^2 - 2n = n(n - 2)$$ 4. **Final answer:** The factorization of $n^2 - 2n$ is $n(n - 2)$. This works because $n$ multiplied by each term inside the parentheses reconstructs the original expression.