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D( v )
v^2+8*v+12 = 0
v^2+8*v+12 = 0
v^2+8*v+12 = 0
v^2+8*v+12 = 0
DELTA = 8^2-(1*4*12)
DELTA = 16
DELTA > 0
v = (16^(1/2)-8)/(1*2) or v = (-16^(1/2)-8)/(1*2)
v = -2 or v = -6
v in (-oo:-6) U (-6:-2) U (-2:+oo)
(2*v^2)/(v^2+8*v+12) = 0
v^2+8*v+12 = 0
v^2+8*v+12 = 0
DELTA = 8^2-(1*4*12)
DELTA = 16
DELTA > 0
v = (16^(1/2)-8)/(1*2) or v = (-16^(1/2)-8)/(1*2)
v = -2 or v = -6
(v+6)*(v+2) = 0
(2*v^2)/((v+6)*(v+2)) = 0
2*v^2 = 0 // : 2
v^2 = 0
v = 0
v = 0
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