x2/9=16

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Solution for x2/9=16 equation: 


x in (-oo:+oo)

(x^2)/9 = 16 // - 16

(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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