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Aplicas ley de signos
+ por + = +
- por - = +
+ por - = -
- por + = -
[( - 3) . ( - 2)] . ( - 4) = (+ 6). ( - 4) = - 24
[ + 6]( - 4) = - 24 = - 24
- 24 = - 24 = - 24
Respuesta.
- 24