A fence is to enclose a rectangular vegetable farm with an area of 400 square meters, if x is the length of one side of this fence, find a function P(x) representing the perimeter of the fencing material.
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X is the length of one side of this fence
area of 400 square meters A = Lw
A = 400 = x (400/x)
P = 2L + 2w
P(x) = 2x + 2(400/x)
P(x) = 2x + 800/x
2x + 800/x meters
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