Lagrange Multipliers App: Minimize the Cost of a Box

[@nicolaspogacsas7271]

Hey, you're helping me a lot out in pre-cal, although I'm not using these videos I just want to say thanks still being active teaching people! You're a life saver!

[@heyysan9860]

w/o your videos i wouldn't be able to make it through my calc 3 class. Thank you! Best math/calc channel.

[@Mathispower4u]

Thank you for such a nice comment! I am glad I could help.

[@kibme5189]

One question I have is why didn't you check the function grad f = 0? I mean the critical points? Why is it useless to do that? I was solving a similar problem where they had said x, y, z should be less than some number in my case 10 because the volume was supposed to be 1, which meant that I needed to check those points but I really don't understand why? Isn't it enough for me to do exactly as you did here? And btw thanks for blessing us with this video lol.