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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(x+2)/x = (x+4)/3 // - (x+4)/3
(x+2)/x-((x+4)/3) = 0
(x+2)/x+(-1*(x+4))/3 = 0
(3*(x+2))/(3*x)+(-1*x*(x+4))/(3*x) = 0
3*(x+2)-1*x*(x+4) = 0
6-x^2-x = 0
6-x^2-x = 0
6-x^2-x = 0
DELTA = (-1)^2-(-1*4*6)
DELTA = 25
DELTA > 0
x = (25^(1/2)+1)/(-1*2) or x = (1-25^(1/2))/(-1*2)
x = -3 or x = 2
(x+3)*(x-2) = 0
((x+3)*(x-2))/(3*x) = 0
((x+3)*(x-2))/(3*x) = 0 // * 3*x
(x+3)*(x-2) = 0
( x+3 )
x+3 = 0 // - 3
x = -3
( x-2 )
x-2 = 0 // + 2
x = 2
x in { -3, 2 }
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