r^2/3=9

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Solution for r^2/3=9 equation: 


r in (-oo:+oo)

(r^2)/3 = 9 // - 9

(r^2)/3-9 = 0

1/3*r^2 = 9 // : 1/3

r^2 = 27

r^2 = 27 // ^ 1/2

abs(r) = 3*3^(1/2)

r = 3*3^(1/2) or r = -(3*3^(1/2))

r in { 3*3^(1/2), -(3*3^(1/2)) }

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