Please help!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Dovator [93]3 years ago

4 0

Collect like terms:
You have 2 with mn so 9mn - 9mn =0
You also have 2 with m4n so -19m4n - 12m4n = -31m4n
Put it together:
-31m4n -8m2
So C
Let me know if you have any questions

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