Answer:
(-mn + 10m + 5n)
Step-by-step explanation:
We have to subtract (15 mn- 22 m + 2n) from ( 14 mn - 12 m + 7n )
(14mn - 12m + 7n) - (15mn - 22 m + 2n)
When open the parenthesis before which a negative sign is given negative sign changes all signs of each term inside.
14mn - 12m + 7n - 15mn + 22m -2m
Now we add and subtract like terms.
(-15mn + 14mn) + (22m - 12m) + ( 7n - 2n )
(-mn + 10m + 5n)
So the answer is (-mn + 10m + 5n)