va rog sa ma ajutati si as vrea si rezolvarea . multumesc.

Răspuns:
[(-1/2)²-1]×(-2/3)
(1/4-1)×(-2/3)
-3/4×(-2/3)
1/2
[tex]( { \frac{ - 1}{2}) }^{2} - 1 \times ( \frac{ - 2}{3} ) = [/tex]
[tex] \frac{1}{4} - \frac{1}{1} \times ( \frac{ - 2}{3} )[/tex]
[tex] = - \frac{1}{3} \times - \frac{2}{3} [/tex]
[tex] = \frac{2}{3} [/tex]