12/x-3x=0

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Solution for 12/x-3x=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

12/x-(3*x) = 0

12/x-3*x = 0

12*x^-1-3*x^1 = 0

(12*x^0-3*x^2)/(x^1) = 0 // * x^2

x^1*(12*x^0-3*x^2) = 0

x^1

12-3*x^2 = 0

12-3*x^2 = 0

DELTA = 0^2-(-3*4*12)

DELTA = 144

DELTA > 0

x = (144^(1/2)+0)/(-3*2) or x = (0-144^(1/2))/(-3*2)

x = -2 or x = 2

x in { -2, 2} 

x in { -2, 2 }

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