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What is (f−g)(x)?

Answer: 3x⁵ - 2x⁴ - x² + x - 21
Step-by-step explanation:
f(x) = 3x⁵ + 6x² - 5
- g(x) = -2x⁴ - 7x² + x - 16
(f - g)(x) = 3x⁵ - 2x⁴ - x² + x - 21