Answer:
3x³ + 10x² + 17x + 12
Step-by-step explanation:
Step 1: Write expression
(3x + 4)(x² + 2x + 3)
Step 2: Distribute 3x
3x³ + 6x² + 9x
Step 3: Distribute 4
4x² + 8x + 12
Step 4: Combine
3x³ + 6x² + 9x + 4x² + 8x + 12
Step 5: Combine like terms
3x³ + 10x² + 17x + 12
