X^2/9-16

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Solution for X^2/9-16 equation: 


X in (-oo:+oo)

(X^2)/9-16 = 0

1/9*X^2 = 16 // : 1/9

X^2 = 144

X^2 = 144 // ^ 1/2

abs(X) = 12

X = 12 or X = -12

X in { 12, -12 }

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