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D( x )
x^2-(16*x)+60 = 0
x^2-(16*x)+60 = 0
x^2-(16*x)+60 = 0
x^2-16*x+60 = 0
x^2-16*x+60 = 0
DELTA = (-16)^2-(1*4*60)
DELTA = 16
DELTA > 0
x = (16^(1/2)+16)/(1*2) or x = (16-16^(1/2))/(1*2)
x = 10 or x = 6
x in (-oo:6) U (6:10) U (10:+oo)
0 = (x-2)/(x^2-(16*x)+60) // - (x-2)/(x^2-(16*x)+60)
0-((x-2)/(x^2-(16*x)+60)) = 0
-((x-2)/(x^2-16*x+60)) = 0
(-1*(x-2))/(x^2-16*x+60) = 0
x^2-16*x+60 = 0
x^2-16*x+60 = 0
DELTA = (-16)^2-(1*4*60)
DELTA = 16
DELTA > 0
x = (16^(1/2)+16)/(1*2) or x = (16-16^(1/2))/(1*2)
x = 10 or x = 6
(x-6)*(x-10) = 0
(-1*(x-2))/((x-6)*(x-10)) = 0
x-2 = 0 // + 2
x = 2
x = 2
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