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D( k )
k = 0
k = 0
k = 0
k in (-oo:0) U (0:+oo)
3/k-(5*k)+6/3-2 = 0
3/k-5*k+6/3-2 = 0
3*k^-1-5*k^1 = 0
(3*k^0-5*k^2)/(k^1) = 0 // * k^2
k^1*(3*k^0-5*k^2) = 0
k^1
3-5*k^2 = 0
3-5*k^2 = 0
DELTA = 0^2-(-5*3*4)
DELTA = 60
DELTA > 0
k = (60^(1/2)+0)/(-5*2) or k = (0-60^(1/2))/(-5*2)
k = (-15^(1/2))/5 or k = (1*15^(1/2))/5
k in { (-15^(1/2))/5, (1*15^(1/2))/5}
k in { (-15^(1/2))/5, (1*15^(1/2))/5 }
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