Question

(- 2/3 elevado a 2)+(- 2/3)+(-2/3 elevado a zero)= é igual a..??

Answer 1

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$(- \frac{2}{3} )^2+(- \frac{2}{3} )+(- \frac{2}{3} )^0= \\ \\ + \frac{4}{9} - \frac{2}{3} +1= \\ \\ mmc(3.9)=9 \\ \\ \frac{4-6+9}{9} = \frac{13-6}{9}= \frac{7}{9}$