x-7/2-2/x+0

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Solution for x-7/2-2/x+0 equation: 


D( x )

x = 0

x = 0

x = 0

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

x-(2/x)-(7/2)+0 = 0

x-2*x^-1-7/2 = 0

1*x^1-2*x^-1-7/2*x^0 = 0

(1*x^2-7/2*x^1-2*x^0)/(x^1) = 0 // * x^2

x^1*(1*x^2-7/2*x^1-2*x^0) = 0

x^1

x^2+(-7/2)*x-2 = 0

x^2+(-7/2)*x-2 = 0

DELTA = (-7/2)^2-(-2*1*4)

DELTA = 81/4

DELTA > 0

x = ((81/4)^(1/2)-(-7/2))/(1*2) or x = (-(-7/2)-(81/4)^(1/2))/(1*2)

x = 4 or x = -1/2

x in { -1/2, 4} 

x in { -1/2, 4 }

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