I'm sorry, but I need more context in order to provide a proper answer. Please clarify what you are referring to when you mention "negative 6."
To determine how to get -6, please provide more context or specify in what context you are referring to. -6 can be obtained in multiple ways depending on the situation. For example, it can be the result of subtracting 6 from 0, multiplying -1 by 6, or even finding the difference between two numbers where one is positive and the other is negative.
