2x-17=9/x

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Solution for 2x-17=9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

2*x-17 = 9/x // - 9/x

2*x-(9/x)-17 = 0

2*x-9*x^-1-17 = 0

2*x^1-9*x^-1-17*x^0 = 0

(2*x^2-17*x^1-9*x^0)/(x^1) = 0 // * x^2

x^1*(2*x^2-17*x^1-9*x^0) = 0

x^1

2*x^2-17*x-9 = 0

2*x^2-17*x-9 = 0

DELTA = (-17)^2-(-9*2*4)

DELTA = 361

DELTA > 0

x = (361^(1/2)+17)/(2*2) or x = (17-361^(1/2))/(2*2)

x = 9 or x = -1/2

x in { -1/2, 9} 

x in { -1/2, 9 }

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