Answer:
3x (2 + 3x²) or 3x (3x² + 2)
Step-by-step explanation:
6x + 9x³
6x + 9x²x
3 · 2x + 3 · 3x²x
3x (2 + 3x²)
3x(2 + 3x^2).
6x+9x^3
Take out the common factor which is 3x.
= 3x(2 + 3x^2).
