9/x-1-3/1-x

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Solution for 9/x-1-3/1-x equation: 


D( x )

x = 0

x = 0

x = 0

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

9/x-x-(3/1)-1 = 0

9/x-x-3-1 = 0

9*x^-1-1*x^1-4*x^0 = 0

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

x^1*(9*x^0-1*x^2-4*x^1) = 0

x^1

9-x^2-4*x = 0

9-x^2-4*x = 0

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

DELTA = 52

DELTA > 0

x = (52^(1/2)+4)/(-1*2) or x = (4-52^(1/2))/(-1*2)

x = (2*13^(1/2)+4)/(-2) or x = (4-2*13^(1/2))/(-2)

x in { (2*13^(1/2)+4)/(-2), (4-2*13^(1/2))/(-2)} 

x in { (2*13^(1/2)+4)/(-2), (4-2*13^(1/2))/(-2) }

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