What is the remainder when (x4 + 36) is divided by (x2 – 8)?

When dividing by x² − 8, we can replace x² with 8 when simplifying the dividend to its remainder. Thus x⁴ = (x²)² becomes 8² = 64, and x⁴ + 36 becomes 64 + 36 = 100. The remainder is 100, choice C.

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