# optimization problems #2

• November 11th 2009, 09:38 AM
jddery
optimization problems #2
Question

Show that among all rectangles with an 8-m perimeter possible, the one with the largest area is a square.
• November 11th 2009, 10:00 AM
Draw a diagram of the problem. Draw a rectangle with sides $x$ and $y$. The perimeter will always be $2y+2x=8$. The area is $A=xy$. Can you see what you need to do now?