Question

Find the maximum or minimum of the following quadratic function: y =-2x^2 - x - 12.
A. -48
B. -12
C. -95/8
D. 11

Answer 1

Take derivative, -4 x -1 and set = 0
x = -1/4
evaluate f(-1/4) = -95/8

Second derivative, -4 ,says slope is decreasing, thus this is a maximum.

Answer 2

thanks