Phân tích đa thức thành nhân tử

a + 2b - 3ab

5. About five million/ bottle/ champagne/ produce/ France/ next year/.

Sắp xếp lại câu: 

3. Because/ terrible weather/ winter/  his physical education students/ indoors/ rather/ outdoors

4. We / be / close friend / because / have / many things / common.