m²(x²+m)+10x+3=x(x+8m)m²x²+m²+10x+3-x²-8mx=0(m²-1)x²+(10-8m)x+m²+3=0不一定是一元二次方程当m=1或-1时二次项系数为0,此时是一元一次方程所以当m不等于1或-1时,是...