∵Δ=b²-4ac
=[-2(3m-1)]²-4×3×(3m²-1)
=36m²-24m+4-36m²+12
=-24m+16
(1)当Δ>0,即-24m+16>0
m<2/3时,方程有两个不相等的实数根;
(2)当Δ=0,即-24m+16=0
m=2/3时,方程有两个相等的实数根;
(3)当Δ<0,即-24m+16<0
m>2/3时,方程没有实数根.
∵Δ=b²-4ac
=[-2(3m-1)]²-4×3×(3m²-1)
=36m²-24m+4-36m²+12
=-24m+16
(1)当Δ>0,即-24m+16>0
m<2/3时,方程有两个不相等的实数根;
(2)当Δ=0,即-24m+16=0
m=2/3时,方程有两个相等的实数根;
(3)当Δ<0,即-24m+16<0
m>2/3时,方程没有实数根.