lesson_certifyit! + Save & Exit Certify Lesson: 4.1b Higher Order Derivatives: th.. 11/ 18 Question 9 of 12, Step 2 of 2 Correct Consider the function: f (x) = -3x4 + 6x +72 Step 2 of 2: Use the Second Derivative Test to locate any local maximum or minimum points in the graph of the given function. Answer Enter your answer as ordered pairs and separate multiple points with a comma. Selecting a radio button will replace the entered answer value(s) with the radio button value. If the radio button is not selected, the