Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Algebra help (grade 12)

  1. Sep 10, 2006 #1
    please help me with this quest i cannot figure it out (please show your work thanks!) sry i made a mistake this is not algebra. it is sloving complex fractions

    Determine a polynomial or rational algebraic expression in simple form equivalent to each of the following: C3

    1+(a+a^-1)^-1



















    the answer is (a^2+a+1)/(a^2+1)
     
    Last edited: Sep 10, 2006
  2. jcsd
  3. Sep 10, 2006 #2

    quasar987

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Each time you encounter addition of fraction, put them on the same denominator. In the end, you'll have (somthing)/(something), which is the goal of the exercice.
     
  4. Sep 11, 2006 #3

    HallsofIvy

    User Avatar
    Science Advisor

    Do you know what a-1 means?
     
  5. Sep 11, 2006 #4
    yes i do it means 1/a

    i just cant get the answer. i have to go to school now so ill post my work when i get home
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook