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anonymous

  • 5 years ago

why do you change the symbol of an inequality when you mulitply or divied by a negative please help me i really need help

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  1. anonymous
    • 5 years ago
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    because if you multiply 8 by -3…for example…and it was greater than the other side, it has suddenly "flipped" to the other side of zero. Make sense?

  2. anonymous
    • 5 years ago
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    its an identity -4 < 5 yes? multiply both by -1 and 4 > -5

  3. anonymous
    • 5 years ago
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    yea sorta but how does that aply to evry inequality

  4. Zarkon
    • 5 years ago
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    assume a<b add -a to both sides a-a<b-a 0<b-a add -b to both sides -b<b-a-b -b<-a

  5. anonymous
    • 5 years ago
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    if while simplifying one you end up with a negative variable between two values, to remove the negative you multiply all by -1 ( and switch the inequalities )

  6. anonymous
    • 5 years ago
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    ok. so if you have a positive number, and multiply it by a negative number, it is now negative/on the other side of zero. if you have a negative number and multiply it by another negative, it becomes positive,ending on the opposite side of zero that it was originally.

  7. anonymous
    • 5 years ago
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    oh okay thank you all for helping me

  8. anonymous
    • 5 years ago
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    no prob. ; )

  9. anonymous
    • 5 years ago
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    and for sure its correct

  10. anonymous
    • 5 years ago
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    ?

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