Answer:
Honestly I can't figure it out myself, but I really want to help you.
Step-by-step explanation:
So I don't know how to write a step-by-step explanation
The Lagrangian is

It has critical points where the first order derivatives vanish:



From the first two equations we get

Then

At these critical points, we have
(maximum)
(minimum)
Answer:
yes you did that correctly
Remove parentheses
3m - 7m+12 = 2 m-3
collect like terms
3m-7m-12 = 2m-6
move terms
-4m - 12 = 2m-6
collect the like terms and calculate
-4m-2m = -6+12
divide both sides by -6
-6m=6
m= -1
8*2=16, 4*4=16, so 16/2 is even and so is 16/8 or 16/4