N^2=25/81

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Solution for N^2=25/81 equation: 


N in (-oo:+oo)

N^2 = 25/81 // - 25/81

N^2-(25/81) = 0

N^2-25/81 = 0

1*N^2 = 25/81 // : 1

N^2 = 25/81

N^2 = 25/81 // ^ 1/2

abs(N) = 5/9

N = 5/9 or N = -5/9

N in { 5/9, -5/9 }

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