x+9/x=-10

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Solution for x+9/x=-10 equation: 


D( x )

x = 0

x = 0

x = 0

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

x+9/x = -10 // + 10

x+9/x+10 = 0

1*x^1+9*x^-1+10*x^0 = 0

(1*x^2+10*x^1+9*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2+10*x^1+9*x^0) = 0

x^1

x^2+10*x+9 = 0

x^2+10*x+9 = 0

DELTA = 10^2-(1*4*9)

DELTA = 64

DELTA > 0

x = (64^(1/2)-10)/(1*2) or x = (-64^(1/2)-10)/(1*2)

x = -1 or x = -9

x in { -9, -1} 

x in { -9, -1 }

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