Because when there is a positive and a negative in the same problem, it gives you a negative. An easy way to solve problems like that is if there is an odd number of negative signs, then your answer is going to be negative. If there is an even number of negative signs, then your answer is going to be positive. (no matter if there is a positive sign in a math problem).
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negative times negative = positive positive times positive = positive negative times positive = negative positive times negative = negative
positive times negative equals negative. positive times positive equals positive. negative times negative equals positive
A negative times a negative equals a positive A negative times a positive equals a negative A positive times a positive equals a positive
A negative times a positive is a negative.
No. A positive times a negative is always negative. A negative times a negative is always a positive.