Resposta :

poty
(-1-1). [5/4-2] -1/2 = (-2) .(- 3/4) - 1/2 =6/4 - 1/2 = 3/2 - 1/2 = 2/2 = 1
[tex](-1-1).[\frac{5}{4}-2]-\frac{1}{2}= \\ \\ -2.\frac{-3}{4}-\frac{1}{2} = \\ \\ \frac{3}{2}-\frac{1}{2}=1[/tex]

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