9-3x2/3

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Solution for 9-3x2/3 equation: 


x in (-oo:+oo)

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

9-x^2 = 0

-1*x^2 = -9 // : -1

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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