What is the product? 4 x times open paren negative 3 x to the 8th power close paren times open paren negative 7 x cubed close paren

Multiply the coefficients: 4 × (−3) × (−7) = 84, since multiplying two negative numbers gives a positive result. Add the exponents of x: 1 + 8 + 3 = 12, so the product is 84x¹², choice C.

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