x2/x-4=16/x-4

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Solution for x2/x-4=16/x-4 equation: 


D( x )

x = 0

x = 0

x = 0

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

(x^2)/x-4 = 16/x-4 // - 16/x-4

(x^2)/x-(16/x)-4+4 = 0

(x^2)/x-16*x^-1-4+4 = 0

1*x^1-16*x^-1 = 0

(1*x^2-16*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-16*x^0) = 0

x^1

x^2-16 = 0

x^2-16 = 0

DELTA = 0^2-(-16*1*4)

DELTA = 64

DELTA > 0

x = (64^(1/2)+0)/(1*2) or x = (0-64^(1/2))/(1*2)

x = 4 or x = -4

x in { -4, 4} 

x in { -4, 4 }

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