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The expanded form of the given expression \((x^3 + 2x - 1)(x + 16)\) is:

\[
x^4 + 16x^3 + 2x^2 + 31x - 16
\]

Looking at the provided options, the correct answer is **C**.

Would you like further explanation or have any questions?

Here are some related questions:
1. How do you expand polynomial expressions?
2. What are some methods for solving polynomial equations?
3. Can this expression be factored again?
4. What does each term in a polynomial represent?
5. How can you verify the solution by factoring?

**Tip:** Always double-check signs when expanding expressions; small errors can lead to the wrong final result.

Expand and simplify the polynomial expression (x^3 + 2x - 1)(x + 16). This problem explores key algebraic concepts like polynomial expansion, distributive property, and combining like terms. Suitable for students in Grades 9-12.

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