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X^2-(((3*x)/2)*x)-6 = 0
X^2+(-3/2)*x^2-6 = 0
-3/2*x^2 = -(X^2-6) // : -3/2
x^2 = -2/3*(6-X^2)
x^2 = -2/3*(6-X^2) // ^ 1/2
abs(x) = (-2/3)^(1/2)*(6-X^2)^(1/2)
x = (-2/3)^(1/2)*(6-X^2)^(1/2) or x = -((-2/3)^(1/2)*(6-X^2)^(1/2))
x in { (-2/3)^(1/2)*(6-X^2)^(1/2), -((-2/3)^(1/2)*(6-X^2)^(1/2)) }
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