1/3x^2-7=-4

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Solution for 1/3x^2-7=-4 equation: 


x in (-oo:+oo)

(1/3)*x^2-7 = -4 // + 4

(1/3)*x^2-7+4 = 0

1/3*x^2 = 3 // : 1/3

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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