-N/i=-Ni/(i*i) = (multiply top and bottom by i
-Ni/-1 = Ni (i times i) = -1
You get a positive number (N) times i.
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Dividing a negative number by a positive number results in a negative answer.
You divide the negative number by a positive number for it to stay positive. And you divide the negative number by a negative number for it to become positive.
it is a negative answer
to divide then a negative number!
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