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D( v )
v = 0
v = 0
v = 0
v in (-oo:0) U (0:+oo)
6/2 = v-(8/v)-3 // - v-(8/v)-3
8/v-v+6/2+3 = 0
8*v^-1-1*v^1+6*v^0 = 0
(6*v^1-1*v^2+8*v^0)/(v^1) = 0 // * v^2
v^1*(6*v^1-1*v^2+8*v^0) = 0
v^1
6*v-v^2+8 = 0
6*v-v^2+8 = 0
DELTA = 6^2-(-1*4*8)
DELTA = 68
DELTA > 0
v = (68^(1/2)-6)/(-1*2) or v = (-68^(1/2)-6)/(-1*2)
v = (2*17^(1/2)-6)/(-2) or v = (-2*17^(1/2)-6)/(-2)
v in { (2*17^(1/2)-6)/(-2), (-2*17^(1/2)-6)/(-2)}
v in { (2*17^(1/2)-6)/(-2), (-2*17^(1/2)-6)/(-2) }
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