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D( x )
0.04-x = 0
0.04-x = 0
0.04-x = 0
0.04-x = 0 // - 0.04
-x = -0.04 // * -1
x = 0.04
x in (-oo:0.04) U (0.04:+oo)
282.05 = (x/(0.04-x))*(0.001-x) // - (x/(0.04-x))*(0.001-x)
282.05-((x/(0.04-x))*(0.001-x)) = 0
(-1*x*(0.001-x))/(0.04-x)+282.05 = 0
(-1*x*(0.001-x))/(0.04-x)+(282.05*(0.04-x))/(0.04-x) = 0
282.05*(0.04-x)-1*x*(0.001-x) = 0
x^2-282.051*x+11.282 = 0
x^2-282.051*x+11.282 = 0
x^2-282.051*x+11.282 = 0
DELTA = (-282.051)^2-(1*4*11.282)
DELTA = 282.051^2-45.128
DELTA = 79507.638601
DELTA > 0
x = ((282.051^2-45.128)^(1/2)+282.051)/(1*2) or x = (282.051-(282.051^2-45.128)^(1/2))/(1*2)
x = ((282.051^2-45.128)^(1/2)+282.051)/2 or x = (282.051-(282.051^2-45.128)^(1/2))/2
(x-((282.051-(282.051^2-45.128)^(1/2))/2))*(x-(((282.051^2-45.128)^(1/2)+282.051)/2)) = 0
((x-((282.051-(282.051^2-45.128)^(1/2))/2))*(x-(((282.051^2-45.128)^(1/2)+282.051)/2)))/(0.04-x) = 0
((x-((282.051-(282.051^2-45.128)^(1/2))/2))*(x-(((282.051^2-45.128)^(1/2)+282.051)/2)))/(0.04-x) = 0 // * 0.04-x
(x-((282.051-(282.051^2-45.128)^(1/2))/2))*(x-(((282.051^2-45.128)^(1/2)+282.051)/2)) = 0
( x-(((282.051^2-45.128)^(1/2)+282.051)/2) )
x-(((282.051^2-45.128)^(1/2)+282.051)/2) = 0 // + ((282.051^2-45.128)^(1/2)+282.051)/2
x = ((282.051^2-45.128)^(1/2)+282.051)/2
( x-((282.051-(282.051^2-45.128)^(1/2))/2) )
x-((282.051-(282.051^2-45.128)^(1/2))/2) = 0 // + (282.051-(282.051^2-45.128)^(1/2))/2
x = (282.051-(282.051^2-45.128)^(1/2))/2
x in { ((282.051^2-45.128)^(1/2)+282.051)/2, (282.051-(282.051^2-45.128)^(1/2))/2 }
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