When subtracting polynomials, distribute the negative sign, then add.

7m^2 - 11m - 2

Step-by-step explanation:

Subtract (-3m^2 + 10m + 4) from 4m^2 - m + 2:

  4m^2 - m + 2

- (-3m^2 + 10m + 4)   Now distribute the negative sign:

  4m^2 - m + 2

+ 3m^2 - 10m - 4

   7m^2 - 11m - 2 is the final answer.

-2

7 - 9 = -2

reversed:

-2 + 9 = 7