What is a solution to (x + 6)(x + 2) = 60?

Expand the left side: (x + 6)(x + 2) = x² + 8x + 12. Setting it equal to 60 gives x² + 8x − 48 = 0, which factors as (x + 12)(x − 4) = 0. Thus x is −12 or 4; among the choices, x = 4 is listed, so the correct choice is C.

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