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D( t )
3*t^2-(8*t)-3 = 0
3*t^2-(8*t)-3 = 0
3*t^2-(8*t)-3 = 0
3*t^2-8*t-3 = 0
3*t^2-8*t-3 = 0
DELTA = (-8)^2-(-3*3*4)
DELTA = 100
DELTA > 0
t = (100^(1/2)+8)/(2*3) or t = (8-100^(1/2))/(2*3)
t = 3 or t = -1/3
t in (-oo:-1/3) U (-1/3:3) U (3:+oo)
(2*t^2-t-15)/(3*t^2-(8*t)-3) = 0
(2*t^2-t-15)/(3*t^2-8*t-3) = 0
2*t^2-t-15 = 0
2*t^2-t-15 = 0
DELTA = (-1)^2-(-15*2*4)
DELTA = 121
DELTA > 0
t = (121^(1/2)+1)/(2*2) or t = (1-121^(1/2))/(2*2)
t = 3 or t = -5/2
(t+5/2)*(t-3) = 0
3*t^2-8*t-3 = 0
3*t^2-8*t-3 = 0
DELTA = (-8)^2-(-3*3*4)
DELTA = 100
DELTA > 0
t = (100^(1/2)+8)/(2*3) or t = (8-100^(1/2))/(2*3)
t = 3 or t = -1/3
(t+1/3)*(t-3) = 0
((t+5/2)*(t-3))/((t+1/3)*(t-3)) = 0
( t+5/2 )
t+5/2 = 0 // - 5/2
t = -5/2
( t-3 )
t-3 = 0 // + 3
t = 3
t in { 3}
t = -5/2
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