1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Please control my math homework! (It's done)

  1. Dec 31, 2008 #1
    Just wanted to control if i made my math homework correctly. Just one exercise. Made it on paper and scanned into computer. The task was to simplify.

    Here it is: http://img504.imageshack.us/img504/6669/mathexecisewq0.jpg

    Please check it before 5th Januar, because i have to show it to my teacher on monday next week.

    Thank you very very much!!!
    P.S sorry for my bad english
  2. jcsd
  3. Dec 31, 2008 #2
    At V)
    in the denominator:
    2.sqrt(x).(x+1).(1-x) = ?
    Should check your work there...

    Other than that, looks good :biggrin:!

    You should always post your math related questions to the other forum - Pre calculus one.

    Just wanted to control if i made my math homework correctly.
    should be
    Just wanted to "check" if i "did" my math homework correctly.
  4. Jan 1, 2009 #3
    Hmmm... i don't see where is the problem. Seems correct to me :rolleyes: :blushing:
    Can you please tell what is wrong there?
  5. Jan 1, 2009 #4
    [itex](x+1)(1-x) = x - x^2 + 1 - x = 1-x^2[/itex] ?
    Last edited: Jan 1, 2009
  6. Jan 1, 2009 #5
    Such a childish mistake from me :blushing:

    Well, thank you very much for your help rootX and snits !
  7. Jan 1, 2009 #6
  8. Jan 1, 2009 #7
    Since the task is to simplify you could probably simplify the final expression a bit more:

    [itex]\frac{x}{\sqrt{x}(x^2-1)} = \frac{x \cdot x^{-1/2}}{x^2-1} = \frac{\sqrt{x}}{x^2-1}[/itex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Please control my math homework! (It's done)
  1. Maths Homework (Replies: 5)