Respuesta :

Answer:

9m^2

Step-by-step explanation:

(2m+4m-3m)^2

3m^2=9m^2

jwhi2987

-3m. 2m+4m is equal to 6m. 3m to the second power is clearly 9m, and 6m-9m would be equal to -3. so -3m is your answer.