Jawabanmu

2014-09-03T09:27:55+07:00
5x  - 5 y = 5 (x-y)

15x² -18xy +9y²  =  3x (5x -6y +3y)

2014-09-03T10:15:19+07:00
1. 5(x-y)
2. 3x(5x-6y+3x) atau 3x(8x-6y)