x*0.5x=9/20

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Solution for x*0.5x=9/20 equation: 


x in (-oo:+oo)

0.5*x*x = 9/20 // - 9/20

0.5*x*x-(9/20) = 0

0.5*x*x-9/20 = 0

0.5*x^2 = 9/20 // : 0.5

x^2 = 0.9

x^2 = 0.9 // ^ 1/2

abs(x) = 0.9^(1/2)

x = 0.9^(1/2) or x = -0.9^(1/2)

x in { 0.9^(1/2), -0.9^(1/2) }

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