3x^2-12/4=9

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Solution for 3x^2-12/4=9 equation: 


x in (-oo:+oo)

3*x^2-(12/4) = 9 // - 9

3*x^2-(12/4)-9 = 0

3*x^2-9-3 = 0

3*x^2 = 12 // : 3

x^2 = 4

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

x in { 2, -2 }

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