First, let's simplify the expression by expanding the product:
-3(m-9)(m-12) = -3(m^2 - 12m - 9m + 108) = -3(m^2 - 21m + 108) = -3m^2 + 63m - 324
Now, let's multiply by 2:
2(-3m^2 + 63m - 324) = -6m^2 + 126m - 648
Therefore, the final expression is -6m^2 + 126m - 648.
First, let's simplify the expression by expanding the product:
-3(m-9)(m-12)
= -3(m^2 - 12m - 9m + 108)
= -3(m^2 - 21m + 108)
= -3m^2 + 63m - 324
Now, let's multiply by 2:
2(-3m^2 + 63m - 324)
= -6m^2 + 126m - 648
Therefore, the final expression is -6m^2 + 126m - 648.