x*x/2=18

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Solution for x*x/2=18 equation: 


x in (-oo:+oo)

(x*x)/2 = 18 // - 18

(x*x)/2-18 = 0

1/2*x^2 = 18 // : 1/2

x^2 = 36

x^2 = 36 // ^ 1/2

abs(x) = 6

x = 6 or x = -6

x in { 6, -6 }

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