Question

(7m³n-mn²)-(-7m³n+8mn²)​

Answer 1

Answer:

123856 x

Step-by-step explanation:

plz mark brainlest

Answer 2

Answer:

9mn²

Step-by-step explanation:

7m³n-1mn²

-7m³n+8mn²

(+) (-)

———————

0. +9mn²

———————

When it comes to subtraction you need to change the sign of second value (here, -7m³n+8mn²)

and follow the rules of subtraction

Please mark my answer as brainliest