why is the prouduct of two negative numbers positive?
95711
There are two things we need to understand axiom and theory.\n\nAxiom -a proposition that is not susceptible of proof or disproof; its truth is assumed to be self-evident\n\nTheory - A well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances.\n\nTheories can be proved but axioms are assumptions.\nProduct of 2 negative number is positive is a axiom.\nAny way there are many explanations about this\ncheck this below link\nhttp://mathforum.org/dr.math/faq/faq.negxneg.html\n\nBut i like this A Mathematical Explanation \n-------------------------------------------\nIf we can agree that a negative number is just a positive number multiplied by -1, then we can always write the product of two negative numbers this way:\n\n   (-a)(-b) = (-1)(a)(-1)(b) = (-1)(-1)ab \nFor example,\n    -2 * -3  = (-1)(2)(-1)(3)\n             = (-1)(-1)(2)(3)\n             = (-1)(-1) * 6\nSo the real question is,\n   (-1)(-1) = ?\nand the answer is that the following convention has been adopted:\n   (-1)(-1) = +1\nThis convention has been adopted for the simple reason that any other convention would cause something to break. \n\nFor example, if we adopted the convention that (-1)(-1) = -1, the distributive property of multiplication wouldn't work for negative numbers:\n   (-1)(1 + -1) = (-1)(1) + (-1)(-1)\n        (-1)(0) = -1 + -1\n              0 = -2\nAs Sherlock Holmes observed, "When you have excluded the impossible, whatever remains, however improbable, must be the truth."\n\nSince everything except +1 can be excluded as impossible, it follows that, however improbable it seems, (-1)(-1) = +1.
733865
its between negative one and 0
678092
Adding a negative number is the same thing as subtracting a positive number. Picture a number line. +2 means to move right 2 spaces. -4 means to move left 4 spaces. You end up on the left side 2 spaces from 0. This is -2.
911111
YES\n\nfirst, the multiplying two negatives is a positive. so that explains why 4/15 is positive.\n\nsecond, the numerator remains 4 on both sides because (-1/3) has a numerator that is 1.\n\nthird, the denominator goes from 5 to 15 because the denominator of (-1/3) is 3. Remember, 5*3 = 15.\n\nTherefore, if you separate fractions into those three components: numerator, denominator and integer (in this case it was 1 or -1), you can do any fraction. This only works for multiplication however, and simplifying sometimes may be necessary.
986175
It is pretty hard to model a negative number, since negative objects don't really exist.  \n\nYou could use a balance scale and show that negative numbers are on one side and positive numbers are on the other side.  You achieve the same result by adding four objects to the positive side as you do by removing four objects from the negative side.
507220
If the signs are the same (pos-pos or neg-neg), you get a positive.\n\nIf the signs are opposite (neg-pos or pos-neg), you get a negative.
469613
two hints:\n\n1) anything raised to the 0 power gives 1\n\n2) anything raised to a negative power means 1/the same thing raised to the positive opposite power.\n\nEnjoy your homework.
680703
Integers are all of the natural numbers.Are you asking about negative and positive integers and why are the signs changed at times?\nIf that is the case,you cannot subtract a negative from a negative because you get a positve.It is counter-intuitve but if you think about it,it makes sense.\nFor instance a -6--6=what?It all depends upon where the signs are placed and if it a parenthetical(if it has parentheses) expression.\nDo you see how that problem can have a number of solutions,depending upon how it is expressed(set up)?\nThe answer is concievably a -12 or it can be zero.\nYou must first understand that the answer may not be evident.\nThere is no easier way to deal with it.You must understand it in your mind:it is strictly an intellect thing.\nIt really is a mind game in ways,but it is a good one.You can do it,it's fun in ways.It teaches you to think and to widen the mind.\nThere is a method to the madness however and once you get that straightend out in your mind,you will feel like a genius.\nIt always works the same and it never works differently:all you have to do is look for the sense of it and ask questions.\nIn the example that I gave,a negative six subtracted from a negative six is a negtive 12.However a double like sign with a negative number cancels itself out and becomes positive.The answer is zero,because there are no parentheses.
461076
the value of the expression increases.\n\nUmm don't think so cuz negative numbers are real numbers and a negative number wouldnt make sense.
738666
There was actually a very gradual development in attitudes toward \nnegative numbers; people didn't just suddenly start to use them at \nthat time. You can read some of this history here:\n\n   Millennium and the Year 0\n   http://mathforum.org/library/drmath/view/52565.html   \n\nThis refers to the Kevin Brown's Negative Numbers page:\n\n   http://www.mathpages.com/home/kmath298.htm   \n\nAnother page I have found with more details is\n\n   Some elements of history of the negative numbers - Anne Boye\n   http://nti.educa.rcanaria.es/penelope/uk_confboye.htm   \n\nwhich, unfortunately, seems to be a poor translation into English, but \nshows negative attitudes toward negative numbers persisting almost to \nthe present.
502841
You cannot take the positive square root of a negative number. The expression (2 - 5/2) is a complex number.
456296
Multiply a negative times a negative and you will get a postive answer.
1019179
Yes, negative x positive always equals negative.  \n        negative x negative always equals negative\n        positive x positive always equals positive
242385
when you multiply two negatives you get a positive because the negative signs cancell each other out
700071
Yes. If you multiply it out it is the same. The square kills off that minus sign because any real number squared is positive.\n\n\nz
398144
Just multiply the numbers.  positives will get a positive answer.  Odd number of negatives will get a negative answer.  Even number of negatives will get a positive answer.
980219
adding two positive integers you just add like normal number\nand the same thing with subtracting two negetive integers except u add a - sign. then with adding one positive and one negetive u subtract the two numbers and whichever number is bigger u would add negetive or positive to the answer\nex. -9+4=\n9-4=5\n9 is the bigger number\nso ur answer is -5\n\nsubtracting integer u keep the first number, do the opposite sign, the last number u switch, like if ur last number is a negetive then u wiould change it to a positive and visa versa\nex. 7-(-2)=\nleave the 7\nswitch the minus to a plus +\nchange the negitive 2 to a positive 2\nso it would be 7+2=9