1/9x^2-1=0

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Solution for 1/9x^2-1=0 equation: 


x in (-oo:+oo)

(1/9)*x^2-1 = 0

1/9*x^2 = 1 // : 1/9

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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