Factor the polynomial completely.4x3 – 12x2 + 7x – 214x2(x – 3) + 7(x – 3)Which is the completely factored polynomial?

Group the terms: 4x³ − 12x² + 7x − 21 = 4x²(x − 3) + 7(x − 3). Both groups contain the common factor (x − 3), so factoring it out gives (4x² + 7)(x − 3), choice D.

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