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D( x )
(0.11-x)^2 = 0
(0.11-x)^2 = 0
(0.11-x)^2 = 0
0.11-x = 0 // - 0.11
-x = -0.11 // * -1
x = 0.11
x in (-oo:0.11) U (0.11:+oo)
2400 = ((x^2)/4)/((0.11-x)^2) // - ((x^2)/4)/((0.11-x)^2)
2400-(((x^2)/4)/((0.11-x)^2)) = 0
(-1*1/4*x^2)/((0.11-x)^2)+2400 = 0
(-1*1/4*x^2)/((0.11-x)^2)+(2400*(0.11-x)^2)/((0.11-x)^2) = 0
2400*(0.11-x)^2-1*1/4*x^2 = 0
9599/4*x^2-528*x+29.04 = 0
9599/4*x^2-528*x+29.04 = 0
9599/4*x^2-528*x+29.04 = 0
DELTA = (-528)^2-(4*29.04*9599/4)
DELTA = 29.04
DELTA > 0
x = (29.04^(1/2)+528)/(2*9599/4) or x = (528-29.04^(1/2))/(2*9599/4)
x = 2/9599*(29.04^(1/2)+528) or x = 2/9599*(528-29.04^(1/2))
(x-2/9599*(528-29.04^(1/2)))*(x-2/9599*(29.04^(1/2)+528)) = 0
((x-2/9599*(528-29.04^(1/2)))*(x-2/9599*(29.04^(1/2)+528)))/((0.11-x)^2) = 0
((x-2/9599*(528-29.04^(1/2)))*(x-2/9599*(29.04^(1/2)+528)))/((0.11-x)^2) = 0 // * (0.11-x)^2
(x-2/9599*(528-29.04^(1/2)))*(x-2/9599*(29.04^(1/2)+528)) = 0
( x-2/9599*(29.04^(1/2)+528) )
x-2/9599*(29.04^(1/2)+528) = 0 // + -2/9599*(29.04^(1/2)+528)
x = -(-2/9599*(29.04^(1/2)+528))
x = 2/9599*(29.04^(1/2)+528)
( x-2/9599*(528-29.04^(1/2)) )
x-2/9599*(528-29.04^(1/2)) = 0 // + -2/9599*(528-29.04^(1/2))
x = -(-2/9599*(528-29.04^(1/2)))
x = 2/9599*(528-29.04^(1/2))
x in { 2/9599*(29.04^(1/2)+528), 2/9599*(528-29.04^(1/2)) }
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