Posted by Lee on Wednesday, December 8, 2010 at 10:05pm.
Let the width of the image (excluding margins) be x, then the height is 1536-x.
The total area of the poster,
A(x)=(x+2*8)(1536/x+2*12)
Differentiate with respect to x, equate to zero and solve for x. I get x=32.
???
Is there anything that you don't follow?
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