x2/3-9=18

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Solution for x2/3-9=18 equation: 


x in (-oo:+oo)

(x^2)/3-9 = 18 // - 18

(x^2)/3-18-9 = 0

1/3*x^2 = 27 // : 1/3

x^2 = 81

x^2 = 81 // ^ 1/2

abs(x) = 9

x = 9 or x = -9

x in { 9, -9 }

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