Need now
which of the following expressions is not in its simplest form?
m + 3 n + 6 mn - 4
9 m + 7 n - 6 mn + 4
7 m - 9 n - 6 mn + 4
9 m + 7 n - 6 mn + 4 m

9 m + 7 n - 6 mn + 4 m

Step-by-step explanation:

m + 3 n + 6 mn - 4 for this expression , it is already in its simplified form as we can not add any term together because they are not have the same variables.

9 m + 7 n - 6 mn + 4 this also is already simplified

7 m - 9 n - 6 mn + 4 the same thing with this

9 m + 7 n - 6 mn + 4 m this particular can still be further simplified because we have 9m and 4m having the same variable and we can therefore add them together , the simplified form of the expression will be

13m + 7n - 6mn

the correct option is b

step-by-step explanation:

step-by-step explanation: