To simplify the expression 3x² + 3 + 9x³ + 4x³ + 2x² + 16, we start by combining like terms.
First, let’s organize the expression:
- Terms with x³: 9x³ + 4x³
- Terms with x²: 3x² + 2x²
- Constant terms: 3 + 16
Next, we combine the like terms:
- x³: 9x³ + 4x³ = 13x³
- x²: 3x² + 2x² = 5x²
- Constants: 3 + 16 = 19
Putting it all together, the simplified expression is:
13x³ + 5x² + 19
So, the final answer is:
13x³ + 5x² + 19.