Answer:
The answer to your question is: It could be letter A but power 5 is not necessary.
Step-by-step explanation:
Simplify like terms
1.- Remove parenthesis
(3m² + m - 5) + (3 - 6m² + 4m + 5m)
3m² + m - 5 + 3 - 6m² + 4m + 5m
2.- Group like terms
(3m² - 6m²) + (m + 4m + 5m) + (3 - 5)
3.- Simplify
- 3m² + 10m - 2
