Answer:
After simplification we get 12 ( m - n ).
Explanation:
Given Polynomial is,
7m - 11n - n + 5m
We need to simplify it.
First we group the like terms.
like terms are the terms which has same variable part.
here 7m , 5m and -11n , -n are like term.
⇒ ( 7m + 5m ) + ( -11n - n )
⇒ ( 7 + 5 )m + ( -11 - 1 )n
⇒ 12m + (-12)n
⇒ 12m - 12n
⇒ 12 ( m - n )
Therefore, After simplification we get 12 ( m - n )