1、(n-1)x^+mx+1=0①有两个相等的实数根,△1=m²-4n+4=0,m²=4n-4>0m^y^-2my-m^-2n^+3=0,△2=4m²-4m²(-m²-2n²+3)=4m²(m²+2n²-2)=4m²(m²+(m²+4)²/8-2)=4m²((m²)²+8m²+16+8m²-16)/8=m²((m²)²+16m²)/2>0,所以方程有两不等根;