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There's sort of two answers to this:
1) it's totally arbitrary, as are all the rules of math.
2) think of all numbers as vectors rather than as scalars.
... Thus all positive numbers lie to the right of the origin, or at 0 degrees - negative numbers are then at 180 degrees.
... Then when you multiply two vectors you add their angles.
... and 180 + 180 = 360 (or 0) and is therefore a positive result.
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What two negative numbers equal positive one?
Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.Any two negative numbers multiplied by each other will result in a positive number.
What two numbers equal a negative 364 when multiplied but also equal a positive 12 when subtracted?
The numbers are 26 and -14
Why does the product of 3 negative numbers equal a negative number number?
Because two negative multiplied together equal a positive. So after the first multiplication we have a positive and a negative. When we multiply these we have a negative.
What does a negative multiplied by a negative equal?
A positive
What is a negative times a negative equal?
A negative multiplied by a negative is a positive.
