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Math Help - negative numbers

  1. #1
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    negative numbers

    if i had -2x-6 ut would be +12 right?
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  2. #2
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    Quote Originally Posted by Arexsis View Post
    if i had -2x-6 ut would be +12 right?

    yes

    (-2) \times (-6) = +12<br />
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  3. #3
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    explain

    Hi,
    can anyone tell me that why is pie value 22/7?
    and why 0 came when we devide any interger to 0
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  4. #4
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    Quote Originally Posted by mack View Post
    Hi,
    can anyone tell me that why is pie value 22/7?
    and why 0 came when we devide any interger to 0
    ____________________________________________
    medium format digital general dentistry raleigh
    \pi = 3.14159 \approx \frac {22}{7} \approx \frac{355}{113}

    Read about pi on this article Pi - Wikipedia, the free encyclopedia
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  5. #5
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    Quote Originally Posted by mack View Post
    Hi,
    why 0 came when we devide any interger to 0
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    <br />
\frac{0}{\text{any number}}=0
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  6. #6
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    Quote Originally Posted by mack View Post
    Hi,
    can anyone tell me that why is pie value 22/7?
    Strictly speaking, pi is NOT 22/7 but it is close. pi is, according to the calculator that comes with MicroSoft Windows, 3.1415926535897932384626433832795 while 22/7 is 3.1428571428571428571428571428571.

    Neither of those is exactly equal to pi but the first is correct to 31 decimal places and 22/7 is correct to 3 decimal places.

    and why 0 came when we devide any interger to 0
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    I assume that "divide any integer to 0" means "divide any integer BY 0".

    Division is the "reverse" of multiplication. Saying that "a/b= c" means "a= bc". If a= 0 then bc must equal 0. As long as b itself is not 0 the only way we can have bc= 0 is if c= 0: 0/a= 0.

    Warning: notice requirement "As long as b itself is not 0". If b were equal to 0, then bc would be 0 no matter what we took c to be: we would not get any one answer for 0/0! It is not true that "0 divided by anything is 0". "0 divided by 0" is not ANYTHING- we cannot divide BY 0.
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