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D( t )
2*t^2-(8*t)-3 = 0
2*t^2-(8*t)-3 = 0
2*t^2-(8*t)-3 = 0
2*t^2-8*t-3 = 0
2*t^2-8*t-3 = 0
DELTA = (-8)^2-(-3*2*4)
DELTA = 88
DELTA > 0
t = (88^(1/2)+8)/(2*2) or t = (8-88^(1/2))/(2*2)
t = (2*22^(1/2)+8)/4 or t = (8-2*22^(1/2))/4
t in (-oo:(8-2*22^(1/2))/4) U ((8-2*22^(1/2))/4:(2*22^(1/2)+8)/4) U ((2*22^(1/2)+8)/4:+oo)
(t-5)/(2*t^2-(8*t)-3) = 0
(t-5)/(2*t^2-8*t-3) = 0
2*t^2-8*t-3 = 0
2*t^2-8*t-3 = 0
DELTA = (-8)^2-(-3*2*4)
DELTA = 88
DELTA > 0
t = (88^(1/2)+8)/(2*2) or t = (8-88^(1/2))/(2*2)
t = (2*22^(1/2)+8)/4 or t = (8-2*22^(1/2))/4
(t-((8-2*22^(1/2))/4))*(t-((2*22^(1/2)+8)/4)) = 0
(t-5)/((t-((8-2*22^(1/2))/4))*(t-((2*22^(1/2)+8)/4))) = 0
t-5 = 0 // + 5
t = 5
t = 5
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