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t in (-oo:+oo)
((t-4)^2)/5-3 = 1 // - 1
((t-4)^2)/5-3-1 = 0
((t-4)^2)/5+(-3*5)/5+(-1*5)/5 = 0
(t-4)^2-3*5-1*5 = 0
t^2-8*t-5+1 = 0
t^2-8*t-4 = 0
t^2-8*t-4 = 0
t^2-8*t-4 = 0
DELTA = (-8)^2-(-4*1*4)
DELTA = 80
DELTA > 0
t = (80^(1/2)+8)/(1*2) or t = (8-80^(1/2))/(1*2)
t = (4*5^(1/2)+8)/2 or t = (8-4*5^(1/2))/2
(t-((8-4*5^(1/2))/2))*(t-((4*5^(1/2)+8)/2)) = 0
((t-((8-4*5^(1/2))/2))*(t-((4*5^(1/2)+8)/2)))/5 = 0
((t-((8-4*5^(1/2))/2))*(t-((4*5^(1/2)+8)/2)))/5 = 0 // * 5
(t-((8-4*5^(1/2))/2))*(t-((4*5^(1/2)+8)/2)) = 0
( t-((4*5^(1/2)+8)/2) )
t-((4*5^(1/2)+8)/2) = 0 // + (4*5^(1/2)+8)/2
t = (4*5^(1/2)+8)/2
( t-((8-4*5^(1/2))/2) )
t-((8-4*5^(1/2))/2) = 0 // + (8-4*5^(1/2))/2
t = (8-4*5^(1/2))/2
t in { (4*5^(1/2)+8)/2, (8-4*5^(1/2))/2 }
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