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D( x )
(x-5)^2 = 0
x^2 = 0
(x-5)^2 = 0
(x-5)^2 = 0
x-5 = 0 // + 5
x = 5
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:5) U (5:+oo)
(3.4*10^-6)/(x^2) = (-2*10^-6)/((x-5)^2) // - (-2*10^-6)/((x-5)^2)
(3.4*10^-6)/(x^2)-((-2*10^-6)/((x-5)^2)) = 0
2*10^-6*(x-5)^-2+(3.4*10^-6)/(x^2) = 0
1/500000/((x-5)^2)+0.0000034/(x^2) = 0
(1/500000*x^2)/(x^2*(x-5)^2)+(0.0000034*(x-5)^2)/(x^2*(x-5)^2) = 0
0.0000034*(x-5)^2+1/500000*x^2 = 0
0.0000054*x^2-0.000034*x+0.000085 = 0
0.0000054*x^2-0.000034*x+0.000085 = 0
0.0000054*x^2-0.000034*x+0.000085 = 0
DELTA = (-0.000034)^2-(0.0000054*0.000085*4)
DELTA = -0.000000001836
DELTA < 0
1 = 0
1/(x^2*(x-5)^2) = 0
1/(x^2*(x-5)^2) = 0 // * x^2*(x-5)^2
1 = 0
x belongs to the empty set
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