Which is the completely factored form of 4 x cubed plus 10 x squared minus 6 x ?

First factor out the greatest common factor, 2x: 4x³ + 10x² − 6x = 2x(2x² + 5x − 3). The quadratic factors as (x + 3)(2x − 1), since their product gives 2x² + 5x − 3. Therefore, the completely factored form is 2x(x + 3)(2x − 1), choice C.

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