(m²+1)x²+mx-1<0△=m²+4(m²+1)=5m²+4>0x1=[-m-√(5m²+4)]/2x2=[-m+√(5m²+4)]/2∴不等式的解为:[-m-√(5m²+4)]/2 < x < [-m+√(5m²+4)]/2