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Math Help - Algebra Questions

  1. #1
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    Algebra Questions

    I need little help with these math problems. Can you please help me?

    a)
    4/6
    4/5

    When I solved it the outcome was 5/6

    b) - 72 - (-7)2

    I got the outcome 0.

    Can you help me?

    My gratitude,

    Gronfeldt
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  2. #2
    Senior Member yeKciM's Avatar
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    Quote Originally Posted by Gronfeldt View Post
    I need little help with these math problems. Can you please help me?

    a)
    4/6
    4/5

    When I solved it the outcome was 5/6

    b) - 72 - (-7)2

    I got the outcome 0.

    Can you help me?

    My gratitude,

    Gronfeldt
    \displaystyle \frac {\frac {4}{6}}{\frac {4}{5}} = \frac {4\cdot 5 }{4\cdot 6}= \frac {5}{6 }
    Last edited by yeKciM; September 11th 2010 at 10:26 AM.
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  3. #3
    Super Member bigwave's Avatar
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    a) is
    \frac{\frac{4}{6}}{\frac{4}{5}}<br />
\Rightarrow<br />
\frac{4}{6}\times\frac{5}{4}<br />
\Rightarrow<br />
\frac{20}{24}<br />
\Rightarrow<br />
\frac{5}{6}<br />
    Last edited by bigwave; September 13th 2010 at 10:27 AM. Reason: took out b)
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  4. #4
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    Quote Originally Posted by bigwave View Post
    a) is
    \frac{\frac{4}{6}}{\frac{4}{5}}<br />
\Rightarrow<br />
\frac{4}{6}\times\frac{5}{4}<br />
\Rightarrow<br />
\frac{20}{24}<br />
\Rightarrow<br />
\frac{5}{6}<br />

    b) if you mean
    -\left(7\right)^2-\left(-7\right)^2<br />
\Rightarrow<br />
-14-14 = 28<br />

    otherwise what was given is correct.... you should us () with problems like this. or better yet latex
    Thank you for your answer, but the ( ) weren't in the second problem. It was:

    -7*2-/-(-7)*2
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  5. #5
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    Algebra Questions-daemi.pdf
    Quote Originally Posted by Gronfeldt View Post
    Thank you for your answer, but the ( ) weren't in the second problem. It was:

    -7*2-/-(-7)*2
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  6. #6
    Junior Member RHandford's Avatar
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    N.E. Lincolnshire
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    Why is 7^2 14 and not 49?
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  7. #7
    Senior Member yeKciM's Avatar
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    Quote Originally Posted by RHandford View Post
    Why is 7^2 14 and not 49?
    heheheheheh

    yes it is

    lol but it's inconclusive is it  7^2 or the  7\cdot 2 and there one part of the brain sow it as  7^2 and while answering second part of the brain saw it as  7\cdot 2 so that's why that typo appear

     -7^2 - (-7)^2 = -49 - (+49) = -98

     -7\cdot 2 - (-7)\cdot 2 = -14 - (-14) = 0
    Last edited by yeKciM; September 11th 2010 at 12:42 PM.
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  8. #8
    Junior Member RHandford's Avatar
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    yeKcIm

    Sorry to be pedantic but:

    -7^2 - (-7)^2 = -49 - (+49) = 98?

    or

    -7^2 - (-7)^2 = -49 - (+49) = -98

    or

    -7^2 - (-7)^2 = -49 - (-49) = 0

    Sorry to be a pain
    Last edited by RHandford; September 11th 2010 at 01:04 PM. Reason: Typo
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  9. #9
    MHF Contributor Unknown008's Avatar
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    -7^2  - (-7)^2 = -49 -(+49) = -49 - 49 = -98

    I'm surprised this thread has gone that many posts, but the solution so much time to be obtained...
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