1/2x^2-2

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Solution for 1/2x^2-2 equation: 


x in (-oo:+oo)

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

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

x^2 = 4

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

x in { 2, -2 }

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