U^-2=64/81

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Solution for U^-2=64/81 equation: 


D( U )

U = 0

U = 0

U = 0

U in (-oo:0) U (0:+oo)

U^-2 = 64/81 // - 64/81

U^-2-(64/81) = 0

U^-2-64/81 = 0

1*U^-2 = 64/81 // : 1

U^-2 = 64/81

-2 < 0

1/(U^2) = 64/81 // * U^2

1 = 64/81*U^2 // : 64/81

81/64 = U^2

U^2 = 81/64 // ^ 1/2

abs(U) = 9/8

U = 9/8 or U = -9/8

U in { 9/8, -9/8 }

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