㎡–3m+1=0,移项得：㎡–3m=-1㎡–3m+1=0两边同乘以m得：m³-3m²+m=0m³=3m²-m所以：2m³–3㎡-7m+2009=2(3m²-m)-3m²-7m+2009=6m²-2m-3m²-7m+2009=3m²-9m+2009=3(m&...