Question

[(-1)*(-3-1)+4]*(-2)=

Answer 1

Olá, Fabi. (=^.^=)/

[(-1)*(-3-1)+4]*(-2) = -16

[(-1)*(-3-1)+4]*(-2) = 
[(-1).(-4)+4].(-2) = 
[4+4].-2 = 
8.-2 = -16

Bons estudos! :-)

Answer 2

Observe:

[(-1) . (-3 - 1) + 4] . (-2) =
[(-1) . (-4) + 4] . (-2) =
[4 + 4] . (-2) =
8 . (-2) =
-16