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D( x )
x^2-(3*x)+10 = 0
x^2-(3*x)+10 = 0
x^2-(3*x)+10 = 0
x^2-3*x+10 = 0
x^2-3*x+10 = 0
DELTA = (-3)^2-(1*4*10)
DELTA = -31
DELTA < 0
x in (-oo:+oo)
(x-5)/(x^2-(3*x)+10) = 0
(x-5)/(x^2-3*x+10) = 0
x^2-3*x+10 = 0
x^2-3*x+10 = 0
DELTA = (-3)^2-(1*4*10)
DELTA = -31
DELTA < 0
1 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
x = 5
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