t+4/t=-5

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Solution for t+4/t=-5 equation: 


D( t )

t = 0

t = 0

t = 0

t in (-oo:0) U (0:+oo)

t+4/t = -5 // + 5

t+4/t+5 = 0

1*t^1+4*t^-1+5*t^0 = 0

(1*t^2+5*t^1+4*t^0)/(t^1) = 0 // * t^2

t^1*(1*t^2+5*t^1+4*t^0) = 0

t^1

t^2+5*t+4 = 0

t^2+5*t+4 = 0

DELTA = 5^2-(1*4*4)

DELTA = 9

DELTA > 0

t = (9^(1/2)-5)/(1*2) or t = (-9^(1/2)-5)/(1*2)

t = -1 or t = -4

t in { -4, -1} 

t in { -4, -1 }

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