Question

(m+n)(a-2)+(m-n)(a-2)


ayudenme

Answer 1

( m + n ) ( a - 2)  + ( m - n ) ( a - 2)
sacando factor comun ( a -2) : 

( a - 2)  [ m + n  + m -n ]

( a - 2 ) [ 2 m ]  Son sus factores