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((3*x)/2)*x-5 = 0
3/2*x^2 = 5 // : 3/2
x^2 = 10/3
x^2 = 10/3 // ^ 1/2
abs(x) = (10/3)^(1/2)
x = (10/3)^(1/2) or x = -(10/3)^(1/2)
x in { (10/3)^(1/2), -(10/3)^(1/2) }
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