Jawabanmu

2013-12-09T19:56:16+07:00
2(4m+3n)-3(5m+2n)
= 8m + 6n - 15m - 6n
= -7m

2013-12-09T20:01:00+07:00
2(4m+3n)-3(5m+2n)= 8m+6n-15m-6n
                            =8m-15m+6n-6n
                             = -7m+0 = -7m