Algebra: A Combined Approach (4th Edition)

(5$m^{2}$ + 6n )( m+1)
5$m^{3}$ + 6mn + 5$m^{2}$ + 6n group term (5$m^{3}$ + 5$m^{2}$) +( 6mn + 6n) 5$m^{2}$ ( m + 1 ) + 6n ( m+ 1 ) factor out GCF from each grouping (5$m^{2}$ + 6n )( m+1)