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D( q )
q = 0
q = 0
q = 0
q in (-oo:0) U (0:+oo)
(3*q^2+4*q-2)/q = 0
3*q^2+4*q-2 = 0
3*q^2+4*q-2 = 0
DELTA = 4^2-(-2*3*4)
DELTA = 40
DELTA > 0
q = (40^(1/2)-4)/(2*3) or q = (-40^(1/2)-4)/(2*3)
q = (2*10^(1/2)-4)/6 or q = (-2*10^(1/2)-4)/6
(q-((-2*10^(1/2)-4)/6))*(q-((2*10^(1/2)-4)/6)) = 0
((q-((-2*10^(1/2)-4)/6))*(q-((2*10^(1/2)-4)/6)))/q = 0
( q-((-2*10^(1/2)-4)/6) )
q-((-2*10^(1/2)-4)/6) = 0 // + (-2*10^(1/2)-4)/6
q = (-2*10^(1/2)-4)/6
( q-((2*10^(1/2)-4)/6) )
q-((2*10^(1/2)-4)/6) = 0 // + (2*10^(1/2)-4)/6
q = (2*10^(1/2)-4)/6
q in { (-2*10^(1/2)-4)/6, (2*10^(1/2)-4)/6 }
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