Answer
$2x^{3}+0x^{2}+6x-4$
Work Step by Step
See: Long Division of Polynomials:
step 1. Arrange the terms of both the dividend and the divisor in descending powers
of any variable.
...
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Fill the blank in with
$2x^{3}+0x^{2}+6x-4$
(the missing power has been added, with coefficient 0)
