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dmezzullo Group Title

Why must you flip the inequality symbol when you divide by a negative number?

  • one year ago
  • one year ago

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  1. dmezzullo Group Title
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    @ParthKohli

    • one year ago
  2. Raven5 Group Title
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    lol really ummm.... just cuz its a rule! haha idk..

    • one year ago
  3. dmezzullo Group Title
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    That helps alot.

    • one year ago
  4. Raven5 Group Title
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    lol im sorry..... :/

    • one year ago
  5. izzy56658989 Group Title
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    to keep the equation equal i think

    • one year ago
  6. izzy56658989 Group Title
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    does that help??

    • one year ago
  7. dmezzullo Group Title
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    I wanna get peoples opions first

    • one year ago
  8. dmezzullo Group Title
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    @SWAG

    • one year ago
  9. lilkittykat36 Group Title
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    You must reverse the sense of inequality because, in essence, you're taking the opposite of both sides. so therfore to keep the equation equal you have to flip the sign.

    • one year ago
  10. e.cociuba Group Title
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    For the same reason you must flip it when you multiply by a negative number. An example should suffice. 2 < 3 If you multiply by -1, without switching the sign, you get: -2 < -3, which is wrong. Actually, -2 > -3. Look at a number line if you are not sure about this - numbers to the left are less than numbers further to the right. Dividing by a negative number is the same as multiplying by the reciprocal, which in this case is also negative. These signs are strictly the "Greater than" and "Less than" signs. The inequality sign is an = with a / stroke through it. If you divide an inequality by -1 it remains an inequality.

    • one year ago
  11. e.cociuba Group Title
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    @dmezzullo does tht make sense.

    • one year ago
  12. siegel Group Title
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    because if you didn't the number would not make sence \[-5<-1\times3=-5<-3\] which is correct, but\[-5<-1\times3\neq-5\times-1<3\] that would be\[5<3\] which is incorrect

    • one year ago
  13. blarghhonk8 Group Title
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    It is to maintain the equality. For example consider the equation: -1 > -2 If you divide or multiply both sides by -1 and DO NOT flip the inequality sign you would then be trying to say 1 > 2 which is obviously not true. Thus you need to flip the inequality sign to ensure the proper answer of 1 < 2

    • one year ago
  14. thearcane Group Title
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    yeah!!! that's because as bigger is the positive number, smaller will be the negative number

    • one year ago
  15. Luis_Rivera Group Title
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    Remember that any quality just says if something is greater or smaller than something else. When you multiply or divide a number by negative quantity, the number becomes either negative or positive. In nother words, if it was bigger it becomes smaller, and if it was smaller it become bigger. Therefore, to maintain the inequality true, you must change the direction of the inequality accordingly

    • one year ago
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