Jack wants to create a rectangular garden that will have an area of 405 ft2. He plans on fencing the perimeter but also wants to add a fence line down the center, splitting his garden into two equal rectangles. What dimensions should he make the garden, so that the total amount of fencing is minimized?

the answer is 5636.7

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

what are the answer choices given for this problem?