有两个不相等的实数根
△=b^2-4ac
=(8m+1)^2-4*2m*8m>0
64m^2+16m+1-64m^2>0
16m+1>0
m>-1/16
m>-(1/16)
如果原方程有两个不相等的实数根
则△>0
△=b²-4ac
=(8m+1)²-4*2m*8m
=64m²+16m+1-64m²
=16m+1>0
m>-(1/16)
有两个不相等的实数根△>0
∵△=b²-4ac=(8m+1) ²-4×2m×8m
=64m²+16m+1-64m²
=16m+1>0
m>-1/16
有两个不相等的实数根
故判别式大于0
即(8m+1)^2-4*2m*8m>0
==>64m^2+16m+1-64m^2>0
==>16m+1>0
==>m>-1/16