Question

2a + 6b - 3 (a + 3b)square​

Answer 1

Answer:

-a + 9b cube is the answer

Step-by-step explanation:

2a + 6b - 3 (a + 3b)square

$2a + 6b - 3a^{2} + 3b {}^{2} \\ = 2a - 3a {}^{2} + 6b + 3b {}^{2} \\ = - a + 9b^{3}$