4-X^2/2

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Solution for 4-X^2/2 equation: 


X in (-oo:+oo)

4-((X^2)/2) = 0

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

X^2 = 8

X^2 = 8 // ^ 1/2

abs(X) = 2*2^(1/2)

X = 2*2^(1/2) or X = -(2*2^(1/2))

X in { 2*2^(1/2), -(2*2^(1/2)) }

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