-6x^2/(x-2)(x+9)

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Solution for -6x^2/(x-2)(x+9) equation: 


D( x )

x-2 = 0

x-2 = 0

x-2 = 0

x-2 = 0 // + 2

x = 2

x in (-oo:2) U (2:+oo)

((-6*x^2)/(x-2))*(x+9) = 0

(-6*x^2*(x+9))/(x-2) = 0

( -6*x^2 )

-6*x^2 = 0 // : -6

x^2 = 0

x = 0

( x+9 )

x+9 = 0 // - 9

x = -9

x in { 0, -9 }

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