3x^2 - 4x - 1
---------------------
2x + 1 | 6x^3 - 7x^2 - 5x
- (6x^3 + 3x^2)
---------------
- 10x^2 - 5x
- (- 10x^2 - 5x)
-----------------
0
Therefore, the quotient is 3x^2 - 4x - 1.
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