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