(1/2)^2-4(1/x)-12

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Solution for (1/2)^2-4(1/x)-12 equation: 


D( x )

x = 0

x = 0

x = 0

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

(1/2)^2-(4*(1/x))-12 = 0

(1/2)^2-4*x^-1-12 = 0

-4*x^-1 = -(1/4-12) // : -4

x^-1 = (12-1/4)/(-4)

-1 < 0

1/(x^1) = (12-1/4)/(-4) // * x^1

1 = ((12-1/4)/(-4))*x^1 // : (12-1/4)/(-4)

-4*(12-1/4)^-1 = x^1

x = -16/47

x = -16/47

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