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Positive time negative = Negative.
Yes, any time you multiply a negative by a negative, it automatically becomes a positive.
Yes, the only time a quotient is negative is when a negative and a positive number are divided.
Its velocity becomes negative. That is, it starts moving back towards its starting point.
Its like reversing the procedure of minus. For example, in -(-1) , you are actually inverting the minus sign with the minus sign outside the bracket to become a positive 1. So in general, -(-x) is equal to x. well every time you see negative x negative gives you a positive. and a negative time a positive makes it negative. here are some examples: (-) (-)= (+), (-) (+)= (-)