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D( x )
62*x+15 = 0
62*x+15 = 0
62*x+15 = 0
62*x+15 = 0 // - 15
62*x = -15 // : 62
x = -15/62
x in (-oo:-15/62) U (-15/62:+oo)
(6*x^2-(14*x)+3)/(62*x+15) = 0
(6*x^2-14*x+3)/(62*x+15) = 0
6*x^2-14*x+3 = 0
6*x^2-14*x+3 = 0
DELTA = (-14)^2-(3*4*6)
DELTA = 124
DELTA > 0
x = (124^(1/2)+14)/(2*6) or x = (14-124^(1/2))/(2*6)
x = (2*31^(1/2)+14)/12 or x = (14-2*31^(1/2))/12
(x-((14-2*31^(1/2))/12))*(x-((2*31^(1/2)+14)/12)) = 0
((x-((14-2*31^(1/2))/12))*(x-((2*31^(1/2)+14)/12)))/(62*x+15) = 0
( x-((14-2*31^(1/2))/12) )
x-((14-2*31^(1/2))/12) = 0 // + (14-2*31^(1/2))/12
x = (14-2*31^(1/2))/12
( x-((2*31^(1/2)+14)/12) )
x-((2*31^(1/2)+14)/12) = 0 // + (2*31^(1/2)+14)/12
x = (2*31^(1/2)+14)/12
x in { (14-2*31^(1/2))/12, (2*31^(1/2)+14)/12 }
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