Answer
3b(3 - 4b)
Step-by-step explanation
9b - 12b²
To factorize, you factor out what is common in both terms.
First, b is common in both terms. factor it out
9b - 12b² = b(9 - 12b)
3 is also common. factoring out we have,
9b - 12b² = b(9 - 12b)
= 3b(3 - 4b)
There no been any other factor, the answer is 3b(3 - 4b)