X^2/9-1=3

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Solution for X^2/9-1=3 equation: 


X in (-oo:+oo)

(X^2)/9-1 = 3 // - 3

(X^2)/9-3-1 = 0

1/9*X^2 = 4 // : 1/9

X^2 = 36

X^2 = 36 // ^ 1/2

abs(X) = 6

X = 6 or X = -6

X in { 6, -6 }

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