x-(15/x)=2

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Solution for x-(15/x)=2 equation: 


D( x )

x = 0

x = 0

x = 0

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

x-(15/x) = 2 // - 2

x-(15/x)-2 = 0

x-15*x^-1-2 = 0

1*x^1-15*x^-1-2*x^0 = 0

(1*x^2-2*x^1-15*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-2*x^1-15*x^0) = 0

x^1

x^2-2*x-15 = 0

x^2-2*x-15 = 0

DELTA = (-2)^2-(-15*1*4)

DELTA = 64

DELTA > 0

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

x = 5 or x = -3

x in { -3, 5} 

x in { -3, 5 }

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