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Ah, I forgot to do the second derivative test and found a maximum instead of a minimum. Then the only critical point you are left with is 0, but 0 isn't positive. So in this situation, you want to find a number closest to this minimum that is in your domain. In this case, it would be:
I drew a rectangle with a diagonal in it and tried to keep the
Yea, so expand on that fact:
I don't know if there is a limit to the amount of questions you can ask here, but so far the help has been really great.