I am really stupid and I can't get this on my own. If $1200 cm^2$ is used to make a square box with open top what is the largest volume the box could be?
I set it up like so $$v = l w h$$
$$v = w^2 h$$ $$1200 = w^2 + 4wh$$
Where do I go from here? Everything I try in wrong.
I tried to make it like so
$$h = 300/w 0 w/4$$ to eilimate h but it didn't help give an answer that is correct.