Answer:
A= m^2-4n+2
Step-by-step explanation:
(9m 2 −7n+4)−(8m 2 −3n+2)
To find the opposite of 8m^2 −3n+2, find the opposite of each term.
9m^2 −7n+4−8m 2 +3n−2
Combine 9m^2 and −8m^2 to get m^2.
m^2 −7n+4+3n−2
Combine −7n and 3n to get −4n.
m^2 −4n+4−2
Subtract 2 from 4 to get 2.
m^2 −4n+2
