两边同乘以(x-3)得：x-2(x-3)=m²(x-3)-x+6=m²x-3m²(1+m²)x=6+3m²x=(6+3m²)/(1+m²)∵方程无解∴x=(6+3m²)/(1+m²)为方程增根即(6+3m²)/(1+m²)=36+3m²=3+...