x2/2=800

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Solution for x2/2=800 equation: 


x in (-oo:+oo)

(x^2)/2 = 800 // - 800

(x^2)/2-800 = 0

1/2*x^2 = 800 // : 1/2

x^2 = 1600

x^2 = 1600 // ^ 1/2

abs(x) = 40

x = 40 or x = -40

x in { 40, -40 }

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