What is the derivative of f(x) = 2x^2 + 3x + -9?
- A. 4x + 3 ✓
- B. 2x^1 + 3
- C. 4x^1
- D. 4x^2 + 3
Correct answer
A. 4x + 3
Explanation
Using the power rule, the derivative of 2x^2 is 4x^1, the derivative of 3x is 3, and the derivative of the constant -9 is 0. So f'(x) = 4x + 3.
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