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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
3/x-(1*(5*x-5)) = 0
3/x-(5*x)+5 = 0
3*x^-1-5*x^1+5*x^0 = 0
(5*x^1-5*x^2+3*x^0)/(x^1) = 0 // * x^2
x^1*(5*x^1-5*x^2+3*x^0) = 0
x^1
5*x-5*x^2+3 = 0
5*x-5*x^2+3 = 0
DELTA = 5^2-(-5*3*4)
DELTA = 85
DELTA > 0
x = (85^(1/2)-5)/(-5*2) or x = (-85^(1/2)-5)/(-5*2)
x = (85^(1/2)-5)/(-10) or x = (85^(1/2)+5)/10
x in { (85^(1/2)-5)/(-10), (85^(1/2)+5)/10}
x in { (85^(1/2)-5)/(-10), (85^(1/2)+5)/10 }
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