((6X^2)-18X-9X)/(9X)

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Solution for ((6X^2)-18X-9X)/(9X) equation: 


D( X )

9*X = 0

9*X = 0

9*X = 0

9*X = 0 // : 9

X = 0

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

(6*X^2-(18*X)-(9*X))/(9*X) = 0

(6*X^2-18*X-9*X)/(9*X) = 0

(6*X^2-27*X)/(9*X) = 0

6*X^2-27*X = 0

3*X*(2*X-9) = 0

2*X-9 = 0 // + 9

2*X = 9 // : 2

X = 9/2

3*X*(X-9/2) = 0

(3*X*(X-9/2))/(9*X) = 0

( 3*X )

3*X = 0 // : 3

X = 0

( X-9/2 )

X-9/2 = 0 // + 9/2

X = 9/2

X in { 0} 

X = 9/2

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