Answer: 2(3m+4n+2) is the answer
Explanation: because I’m smort;)

First compute the first-order partial derivatives and find the critical points.


Both first order derivatives vanish at

.
Computing the Hessian, we get

We have

, which means

is an extremum of

. Since

, this extremum is a local maximum of

with a value of 21.
Answer:
8 km
Step-by-step explanation:
im a genius in math so trust me