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D( x )
x-5 = 0
x-5 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
x in (-oo:5) U (5:+oo)
(3*x^2-(13*x)-10)/(x-5) = 0
(3*x^2-13*x-10)/(x-5) = 0
3*x^2-13*x-10 = 0
3*x^2-13*x-10 = 0
DELTA = (-13)^2-(-10*3*4)
DELTA = 289
DELTA > 0
x = (289^(1/2)+13)/(2*3) or x = (13-289^(1/2))/(2*3)
x = 5 or x = -2/3
(x+2/3)*(x-5) = 0
x+2/3 = 0
x+2/3 = 0 // - 2/3
x = -2/3
x = -2/3
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