Multiple Choice

A structural design apprentice is updating a technical manual that includes the factored form of the volumetric expression x3+64x^3 + 64. To correctly apply the sum of cubes identity (x [sign 1]4)(x2 [sign 2]4x [sign 3]16)(x \text{ [sign 1]} 4)(x^2 \text{ [sign 2]} 4x \text{ [sign 3]} 16), which sequence of signs must the apprentice recall?

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Updated 2026-04-20

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