(X/2)^2-9=0

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Solution for (X/2)^2-9=0 equation: 


X in (-oo:+oo)

(X/2)^2-9 = 0

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

X^2 = 36

X^2 = 36 // ^ 1/2

abs(X) = 6

X = 6 or X = -6

X in { 6, -6 }

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