You can put this solution on YOUR website! Use the discriminate to determine the number of and type of solutions.
-3m^2 - 7m = 6
-3m^2 - 7m - 6 = 0
Disc = b^2 - 4ac
= 7^2 - 4*-3*-6
= 49 -96
Disc < 0 --> 2 complex solutions.
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PS It's discriminant.