x*x/x*x-9+3x/x*x-9

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Solution for x*x/x*x-9+3x/x*x-9 equation: 


D( x )

x = 0

x = 0

x = 0

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

((x*x)/x)*x+((3*x)/x)*x-9-9 = 0

x^2+3*x-18 = 0

DELTA = 3^2-(-18*1*4)

DELTA = 81

DELTA > 0

x = (81^(1/2)-3)/(1*2) or x = (-81^(1/2)-3)/(1*2)

x = 3 or x = -6

x in { -6, 3 }

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