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D( x )
2*x+4 = 0
2*x+4 = 0
2*x+4 = 0
2*x+4 = 0 // - 4
2*x = -4 // : 2
x = -4/2
x = -2
x in (-oo:-2) U (-2:+oo)
(x^2+12*x+24)/(2*x+4) = 0
x^2+12*x+24 = 0
x^2+12*x+24 = 0
DELTA = 12^2-(1*4*24)
DELTA = 48
DELTA > 0
x = (48^(1/2)-12)/(1*2) or x = (-48^(1/2)-12)/(1*2)
x = (4*3^(1/2)-12)/2 or x = (-4*3^(1/2)-12)/2
(x-((-4*3^(1/2)-12)/2))*(x-((4*3^(1/2)-12)/2)) = 0
((x-((-4*3^(1/2)-12)/2))*(x-((4*3^(1/2)-12)/2)))/(2*x+4) = 0
( x-((-4*3^(1/2)-12)/2) )
x-((-4*3^(1/2)-12)/2) = 0 // + (-4*3^(1/2)-12)/2
x = (-4*3^(1/2)-12)/2
( x-((4*3^(1/2)-12)/2) )
x-((4*3^(1/2)-12)/2) = 0 // + (4*3^(1/2)-12)/2
x = (4*3^(1/2)-12)/2
x in { (-4*3^(1/2)-12)/2, (4*3^(1/2)-12)/2 }
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