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D( x )
x+3 = 0
x+3 = 0
x+3 = 0
x+3 = 0 // - 3
x = -3
x in (-oo:-3) U (-3:+oo)
(x^2+11*x+17)/(x+3) = 0
x^2+11*x+17 = 0
x^2+11*x+17 = 0
DELTA = 11^2-(1*4*17)
DELTA = 53
DELTA > 0
x = (53^(1/2)-11)/(1*2) or x = (-53^(1/2)-11)/(1*2)
x = (53^(1/2)-11)/2 or x = (-(53^(1/2)+11))/2
(x+(53^(1/2)+11)/2)*(x-((53^(1/2)-11)/2)) = 0
((x+(53^(1/2)+11)/2)*(x-((53^(1/2)-11)/2)))/(x+3) = 0
( x+(53^(1/2)+11)/2 )
x+(53^(1/2)+11)/2 = 0 // - (53^(1/2)+11)/2
x = -((53^(1/2)+11)/2)
( x-((53^(1/2)-11)/2) )
x-((53^(1/2)-11)/2) = 0 // + (53^(1/2)-11)/2
x = (53^(1/2)-11)/2
x in { -((53^(1/2)+11)/2), (53^(1/2)-11)/2 }
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