-1/2=x^2

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


x in (-oo:+oo)

-1/2 = x^2 // - x^2

-x^2-1/2 = 0

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

x^2 = -1/2

x belongs to the empty set

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