Which polynomial has (3x + 2) as a binomial factor?

Group the terms in choice B: 12x² + 15x + 8x + 10 = 3x(4x + 5) + 2(4x + 5). Factoring out the shared binomial gives (3x + 2)(4x + 5), so (3x + 2) is a factor. The correct choice is B, the polynomial 12x² + 15x + 8x + 10.

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