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D( x )
x^2-(5*x)+6 = 0
x^2-(5*x)+6 = 0
x^2-(5*x)+6 = 0
x^2-5*x+6 = 0
x^2-5*x+6 = 0
DELTA = (-5)^2-(1*4*6)
DELTA = 1
DELTA > 0
x = (1^(1/2)+5)/(1*2) or x = (5-1^(1/2))/(1*2)
x = 3 or x = 2
x in (-oo:2) U (2:3) U (3:+oo)
(x^2-(6*x)+8)/(x^2-(5*x)+6) = 0
(x^2-6*x+8)/(x^2-5*x+6) = 0
x^2-6*x+8 = 0
x^2-6*x+8 = 0
DELTA = (-6)^2-(1*4*8)
DELTA = 4
DELTA > 0
x = (4^(1/2)+6)/(1*2) or x = (6-4^(1/2))/(1*2)
x = 4 or x = 2
(x-2)*(x-4) = 0
x^2-5*x+6 = 0
x^2-5*x+6 = 0
DELTA = (-5)^2-(1*4*6)
DELTA = 1
DELTA > 0
x = (1^(1/2)+5)/(1*2) or x = (5-1^(1/2))/(1*2)
x = 3 or x = 2
(x-2)*(x-3) = 0
((x-2)*(x-4))/((x-2)*(x-3)) = 0
( x-2 )
x-2 = 0 // + 2
x = 2
( x-4 )
x-4 = 0 // + 4
x = 4
x in { 2}
x = 4
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