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

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


D( x )

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

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

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

x^2-6*x+9 = 0

x^2-6*x+9 = 0

DELTA = (-6)^2-(1*4*9)

DELTA = 0

x = 6/(1*2)

x = 3 or x = 3

x in (-oo:3) U (3:+oo)

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

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

x^2-6*x+9 = 0

x^2-6*x+9 = 0

DELTA = (-6)^2-(1*4*9)

DELTA = 0

x = 6/(1*2)

x = 3 or x = 3

(x-3)^2 = 0

(x^2-9)/((x-3)^2) = 0

1*x^2 = 9 // : 1

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3} 

x = -3

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