(2/3)x^2-4=12

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Solution for (2/3)x^2-4=12 equation: 


x in (-oo:+oo)

(2/3)*x^2-4 = 12 // - 12

(2/3)*x^2-12-4 = 0

2/3*x^2 = 16 // : 2/3

x^2 = 24

x^2 = 24 // ^ 1/2

abs(x) = 2*6^(1/2)

x = 2*6^(1/2) or x = -(2*6^(1/2))

x in { 2*6^(1/2), -(2*6^(1/2)) }

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