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D( x )
0.57-x = 0
0.57-x = 0
0.57-x = 0
0.57-x = 0 // - 0.57
-x = -0.57 // * -1
x = 0.57
x in (-oo:0.57) U (0.57:+oo)
(x^2)/(0.57-x) = 0.083 // - 0.083
(x^2)/(0.57-x)-0.083 = 0
(x^2)/(0.57-x)+(-0.083*(0.57-x))/(0.57-x) = 0
x^2-0.083*(0.57-x) = 0
x^2+0.083*x-0.04731 = 0
x^2+0.083*x-0.04731 = 0
x^2+0.083*x-0.04731 = 0
DELTA = 0.083^2-(-0.04731*1*4)
DELTA = 0.083^2+0.18924
DELTA = 0.196129
DELTA > 0
x = ((0.083^2+0.18924)^(1/2)-0.083)/(1*2) or x = (-(0.083^2+0.18924)^(1/2)-0.083)/(1*2)
x = ((0.083^2+0.18924)^(1/2)-0.083)/2 or x = (-((0.083^2+0.18924)^(1/2)+0.083))/2
(x+((0.083^2+0.18924)^(1/2)+0.083)/2)*(x-(((0.083^2+0.18924)^(1/2)-0.083)/2)) = 0
((x+((0.083^2+0.18924)^(1/2)+0.083)/2)*(x-(((0.083^2+0.18924)^(1/2)-0.083)/2)))/(0.57-x) = 0
((x+((0.083^2+0.18924)^(1/2)+0.083)/2)*(x-(((0.083^2+0.18924)^(1/2)-0.083)/2)))/(0.57-x) = 0 // * 0.57-x
(x+((0.083^2+0.18924)^(1/2)+0.083)/2)*(x-(((0.083^2+0.18924)^(1/2)-0.083)/2)) = 0
( x+((0.083^2+0.18924)^(1/2)+0.083)/2 )
x+((0.083^2+0.18924)^(1/2)+0.083)/2 = 0 // - ((0.083^2+0.18924)^(1/2)+0.083)/2
x = -(((0.083^2+0.18924)^(1/2)+0.083)/2)
( x-(((0.083^2+0.18924)^(1/2)-0.083)/2) )
x-(((0.083^2+0.18924)^(1/2)-0.083)/2) = 0 // + ((0.083^2+0.18924)^(1/2)-0.083)/2
x = ((0.083^2+0.18924)^(1/2)-0.083)/2
x in { -(((0.083^2+0.18924)^(1/2)+0.083)/2), ((0.083^2+0.18924)^(1/2)-0.083)/2 }
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