The first one is a maximum and the a.s. is x=1
The second one is a minimum and the a.s. is x=-2
Answer:
-4
Step-by-step explanation:
f(x) = 4x - 12
Let x=2
f(2) = 4*2 - 12
= 8-12
= -4
Answer:

And on this case we can use the product rule for a derivate given by:

Where
and
And replacing we have this:

Step-by-step explanation:
We assume that the function of interest is:

And on this case we can use the product rule for a derivate given by:

Where
and
And replacing we have this:

Answer: -2
(-5)(-1)x=(10)(-1)
5x = -10
x = -2