Question

calcule o valor dessa expressão

Answer 1

 (-\frac{1}{3} ) ^{2}  - ( -\frac{1}{3} ) ^{-2} = (-\frac{1}{3} ) x^{2}  = (\frac{1}{9}) // ( -\frac{1}{3} ) ^{-2}  =  9 //  \frac{1}{9} - 9   = \frac{1}{9} - \frac{9}{1} = \frac{-80}{9}$(-\frac{1}{3} ) ^{2} - ( -\frac{1}{3} ) ^{-2} = (-\frac{1}{3} ) x^{2} = (\frac{1}{9}) // ( -\frac{1}{3} ) ^{-2} = 9 // \frac{1}{9} - 9 = \frac{1}{9} - \frac{9}{1} = \frac{-80}{9}$