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you try to get the results positive or negative?
okay, let's make some example. they said is completely different actions in solving :) what do you think?
well, depending on what are we talking about, algebra or ARITHMETIC
then it possible to have a negative number :) like how do you get -6 into 6? you plus 12 right?
well, depending on which way you want the results to be, negative or positive, its not actually different, well, reads these might give you more info. http://www.mathsisfun.com/positive-negative-integers.html http://www.themathpage.com/alg/signed-numbers.htm but to me, there is no different in add or subtract those :) the only different we have is the results it give us :)
This is a bad question. Subtracting is not an operation Really we are adding the additive inverse of a number, so now we are adding the additive inverse of an additive inverse. \(a-(-b)=a+(-(-b))\). The one on the left is just an abuse in notation.
I should be very clear and say that subtraction is not an operation on the real numbers as a field because subtraction is not associative. But that was boring. . .