Question

Perform the operation indicated, then place the answer in the proper location on the grid. Write your answer in descending powers of m.

(5m 3 + 3mn 2) + (-7m 2 n + mn 2 - n 3) - (mn 2 + 2m 3)

Answer 1

@hero @loveboy

Answer 2

Remove the first set of parentheses.
Then remove the second set leaving the signs of the terms the same, because the sign in front of the parentheses is +.
For the third set you will have to distribute the negative over the terms inside so for example + 2 m^3 will become - 2 m^3

Finally combine like terms , then arrange in descending powers.

Answer 3

reckon you mean this:

\((5m^3 + 3mn^2) + (-7m^2 n + mn^2 - n^3) - (mn^2 + 2m^3)\)

follow the cat :)