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D( x )
2*x^2-(11*x)+5 = 0
2*x^2-(11*x)+5 = 0
2*x^2-(11*x)+5 = 0
2*x^2-11*x+5 = 0
2*x^2-11*x+5 = 0
DELTA = (-11)^2-(2*4*5)
DELTA = 81
DELTA > 0
x = (81^(1/2)+11)/(2*2) or x = (11-81^(1/2))/(2*2)
x = 5 or x = 1/2
x in (-oo:1/2) U (1/2:5) U (5:+oo)
(x^2+5*x+6)/(2*x^2-(11*x)+5) = 0
(x^2+5*x+6)/(2*x^2-11*x+5) = 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 = (-1^(1/2)-5)/(1*2)
x = -2 or x = -3
(x+3)*(x+2) = 0
2*x^2-11*x+5 = 0
2*x^2-11*x+5 = 0
DELTA = (-11)^2-(2*4*5)
DELTA = 81
DELTA > 0
x = (81^(1/2)+11)/(2*2) or x = (11-81^(1/2))/(2*2)
x = 5 or x = 1/2
(x-1/2)*(x-5) = 0
((x+3)*(x+2))/((x-1/2)*(x-5)) = 0
( x+2 )
x+2 = 0 // - 2
x = -2
( x+3 )
x+3 = 0 // - 3
x = -3
x in { -2, -3 }
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