Question

Can you help me find the absolute min and max?
y=-2x² + 12x – 20; [2, 4]

Answer 1

x = -3

Explanation:

There can be only one possibility:

either maxima or minima

1. differentiate the equation

2. slope = 4x + 12

3. at absolute maxima or minima slope of graph is 0

4. 0 = 4x +12

5. 4x = -12

6. x = -3