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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(x^2-(3*x)-10)/x-5 = 0
(x^2-3*x-10)/x-5 = 0
(x^2-3*x-10)/x+(-5*x)/x = 0
x^2-3*x-5*x-10 = 0
x^2-8*x-10 = 0
x^2-8*x-10 = 0
x^2-8*x-10 = 0
DELTA = (-8)^2-(-10*1*4)
DELTA = 104
DELTA > 0
x = (104^(1/2)+8)/(1*2) or x = (8-104^(1/2))/(1*2)
x = (2*26^(1/2)+8)/2 or x = (8-2*26^(1/2))/2
(x-((8-2*26^(1/2))/2))*(x-((2*26^(1/2)+8)/2)) = 0
((x-((8-2*26^(1/2))/2))*(x-((2*26^(1/2)+8)/2)))/x = 0
((x-((8-2*26^(1/2))/2))*(x-((2*26^(1/2)+8)/2)))/x = 0 // * x
(x-((8-2*26^(1/2))/2))*(x-((2*26^(1/2)+8)/2)) = 0
( x-((2*26^(1/2)+8)/2) )
x-((2*26^(1/2)+8)/2) = 0 // + (2*26^(1/2)+8)/2
x = (2*26^(1/2)+8)/2
( x-((8-2*26^(1/2))/2) )
x-((8-2*26^(1/2))/2) = 0 // + (8-2*26^(1/2))/2
x = (8-2*26^(1/2))/2
x in { (2*26^(1/2)+8)/2, (8-2*26^(1/2))/2 }
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