What is the following sum? 2 times open paren cube root of 16 x cubed y close paren plus 4 times open paren cube root of 54 x to the 6th power y to the 5th power close paren

Simplify each cube root by taking out perfect cubes: ∛(16x³y) = 2x∛(2y), so the first term becomes 4x∛(2y). Also, ∛(54x⁶y⁵) = 3x²y∛(2y²), so the second term becomes 12x²y∛(2y²). Together these match choice D.

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