yes.
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Two negatives make a positive in multiplication and division
two negatives makes a positive, meaning you add. i.e. 2 - -2 = 2+2 = 4
You know the saying two lefts don't make a right? Well, the opposite applies here. Two negatives indeed do make a positive. Say I have two numbers, 10 and -5, and I want to subtract the positive one from the negative one. 10 - (-5) <-- two negatives in a row become a positive. 10 + 5 = 15 You can verify this yourself by using a number line. The difference is visually the distance between two numbers on a number line. The distance from 10 to -5 is indeed 15.
No
They can if the binary operation is multiplication or division.