Question

Efetue:

-2+[(-4).(-7+12)+5]=

13-[(-1).(4-5)-2.(-1)]=

13+2.[-7-5.(-9+4)]=

Me ajudem pfv

Answer 1

Resposta:

Vamos lá!

-2+[(-4).(-7+12)+5]=

- 2 + [- 4 . 5 + 5] =

- 2 + [ - 20 + 5] =

- 2 + [- 15] =

- 2 - 15 =

- 17

13-[(-1).(4-5)-2.(-1)]=

13 - [(- 1) . (- 1) + 2] =

13 - [1 + 2] =

13 - 3 =

10

13+2.[-7-5.(-9+4)]=

13 + 2 . [- 7 - 5 . (- 5)] =

13 + 2 . [- 7 + 25] =

13 + 2 . [18] =

13 + 36 =

49