(x^(1/2)-3)/(x^2-81)

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Solution for (x^(1/2)-3)/(x^2-81) equation: 


D( x )

x < 0

x^2-81 = 0

x < 0

x^2-81 = 0

x^2-81 = 0

1*x^2 = 81 // : 1

x^2 = 81

x^2 = 81 // ^ 1/2

abs(x) = 9

x = 9 or x = -9

x in <0:9) U (9:+oo)

(x^(1/2)-3)/(x^2-81) = 0

1*x^(1/2) = 3 // : 1

x^(1/2) = 3

x^(1/2) = 3 // ^ 2

x = 9

x in { 9} 

x belongs to the empty set

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