Answer:
Max
Step-by-step explanation:
y" = -2
Basically is a constant value of -2, which doesn't depend on x.
Find the turning point using y' = 0.
y' = 4 - 2x = 0
4 - 2x = 0
x = 2
So the turning point is at x = 2,
y = 5 + 4(2) - 2² = 9
(2,9) is the turning point
For the nature (max/min):
y" = -2
Since y" < 0, it is a maximum turning point
