X/4-9/X=0

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Solution for X/4-9/X=0 equation: 


D( X )

X = 0

X = 0

X = 0

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

X/4-(9/X) = 0

X/4-9*X^-1 = 0

1/4*X^1-9*X^-1 = 0

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

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

X^1

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

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

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

DELTA = 9

DELTA > 0

X = (9^(1/2)+0)/(2*(1/4)) or X = (0-9^(1/2))/(2*(1/4))

X = 6 or X = -6

X in { -6, 6} 

X in { -6, 6 }

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