- #36
Mark44
Mentor
- 37,779
- 10,168
You can choose to not make the cut at all, so that you make only a square or only a circle. So the domain of A(x) is {x in the real numbers| 0 <= x <= 8}.
Now finish the problem. Be sure to check x = 0 and x = 8 after you have solved A'(x) = 0. That way you can be sure you have found the absolute maximum area.