Answer:
C. m^2 - 7
Step-by-step explanation:
First, remove the parentheses. They are not needed, as we will be grouping like terms:
m^2 - m - 3 + m - 4
Now, we will group terms that are similar, or the same. Here, we can group both the -m and the m. These terms cancel out.
We can also group the constants, or numbers that don't have a variable attached to them:
m^2 - m + m - 3 - 4
Which, further simplifies into:
m^2 - 3 - 4
^^^Here, we cancelled out both of the m
Now, we subtract the -3 and -4:
m^2 - 7
This equation cannot be further simplified, and the answer option C matches.
Hope this helps!
-Mary
