Question

a) 2-[(-2/5)•3-(-1/4)•2-3/2]•(1/2-5)​

Answer 1

Resposta:

Explicação passo-a-passo:

   2- [(-2/5)•3 - (-1/4)•2 - 3/2] • (1/2 - 5)​ =

   2 - [- 6/5  + 1/4 . 2  - 3/2] . 9/2 =

   2 - [- 6/5 + 2/4 - 3/2] . 9/2 = ¨¨¨¨¨¨¨¨¨¨(mmc(2,4,5) = 20

   2 - [ - 24/20 + 10/20 - 30/20] . 9/2 =

   2 - [ - 44/20] . 9/2 = ¨¨¨¨¨¨¨(simplificando 44/20)

   2 - [ - 11/5] . 9/2 =

   2 + 11/5 . 9/2 =

   2 + 99/10 =

     119/10