What is the completely factored form of the expression 16x2 + 8x + 32?

The greatest common factor of 16x², 8x, and 32 is 8. Factoring it out gives 8(2x² + x + 4), which is choice C. The trinomial inside does not factor further over the integers because its discriminant is 1 − 4(2)(4) = −31, which is negative.

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