(x^4-81)/(x^2-3)

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Solution for (x^4-81)/(x^2-3) equation: 


D( x )

x^2-3 = 0

x^2-3 = 0

x^2-3 = 0

1*x^2 = 3 // : 1

x^2 = 3

x^2 = 3 // ^ 1/2

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

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

x in (-oo:-3^(1/2)) U (-3^(1/2):3^(1/2)) U (3^(1/2):+oo)

(x^4-81)/(x^2-3) = 0

1*x^4 = 81 // : 1

x^4 = 81

x^4 = 81 // ^ 1/4

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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