what is a simpler form of (-4m^3 - m + 9) - (4m^2 + m - 12)?
The simpler form of (-4m^3 - m + 9) - (4m^2 + m - 12) can be found by first distributing the negative sign inside the parentheses of the second expression:
(-4m^3 - m + 9) - 4m^2 - m + 12
Then, combining like terms:
-4m^3 - 4m^2 - 2m + 21
Therefore, the simpler form of (-4m^3 - m + 9) - (4m^2 + m - 12) is -4m^3 - 4m^2 - 2m + 21.