Results 1 to 2 of 2

Math Help - Practicing for an exam & needdd more helppp

  1. #1
    Newbie
    Joined
    Oct 2008
    Posts
    8

    Practicing for an exam & needdd more helppp

    . Simplify the following rational expressions.




    2 - 3

    X -1 x+1







    2x + 7x +3

    2x - 7x - 4


    2x + 5 + x + 1


    x + 6x + 9 x - 9 x - 3
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Apr 2008
    Posts
    1,092
    For most problems like this, you just have to combine like terms.

    Quote Originally Posted by Michelle Belford View Post
    . Simplify the following rational expressions.
    2x + 7x +3

    2x - 7x - 4
    I'm assuming here you want to factor the expressions.

    Note that the roots of ax^2 + bx + c, where a, b, and c are integers, must be factors of c divided by factors of a.

    To factor, you have to use this knowledge to your advantage and try different factors. Recognize that 2x^2 + 7x + 3 must factor to (2x + p)(x + q), and we have that 2x^2 + 7x + 3 = 2x^2 + (p + 2q)x + pq. So p + 2q = 7 and pq = 3. You should be able to see relatively quickly that p = 1 and q = 3, which gives you a factorization of (2x + 1)(x + 3). Can you do the other factorization problem?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Probability of Events - Helppp Please
    Posted in the Statistics Forum
    Replies: 3
    Last Post: December 29th 2008, 05:32 AM
  2. HELPPP ...... Impossible... PLZ
    Posted in the Statistics Forum
    Replies: 3
    Last Post: March 8th 2008, 02:34 AM
  3. Hyperbolic Diff helppp
    Posted in the Calculus Forum
    Replies: 2
    Last Post: January 18th 2007, 06:45 AM
  4. needdd major help solving a system
    Posted in the Algebra Forum
    Replies: 1
    Last Post: December 10th 2006, 04:58 AM
  5. urgggeeeeeennnnnnnnntttt plz helppp
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 11th 2006, 06:16 AM

Search Tags


/mathhelpforum @mathhelpforum