Question

QUAL E O VALOR DA EXPRESSAO NUMERICA

1/2-[(-1)^2 - 6 . (-2/3)^2]=


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Answer 1

$\frac{1}{2} -[(-1)^2-6.(- \frac{2}{3} )^2]= \\ \\ \frac{1}{2} -[+1-\not6^2.( \frac{4}{\not9_3} )]= \\ \\ \frac{1}{2} -[+1-2.( \frac{4}{3} } ]= \\ \\ \frac{1}{2}- [1- \frac{8}{3} ]= \\ \\ \frac{1}{2} -[ \frac{3-8}{3} ]= \\ \\ \frac{1}{2} -(- \frac{5}{3}) = \\ \\ \frac{1}{2} + \frac{5}{3}= \\ \\ mmc(2,3)=6 \\ \\ \frac{3+10}{6} =\fbox{ \frac{13}{6} }$