Results 1 to 2 of 2

Math Help - Simplyfing Algebraic Expressions With Absolute Value

  1. #1
    Newbie
    Joined
    Aug 2010
    Posts
    3

    Simplyfing Algebraic Expressions With Absolute Value

    The questions is simplify:
    (a) [6-2y] if y≥3
    (b) [x+3] - [x-2] if -2<x<0.

    So far i know that if x is greater than or equal to zero then x is positive. After that I don't know what to do. It gets confusing for me. Can someone explain in detail how to do this?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Lord of certain Rings
    Isomorphism's Avatar
    Joined
    Dec 2007
    From
    IISc, Bangalore
    Posts
    1,465
    Thanks
    6
    |x| = x when x is non negative and |x| = -x when x is negative.

    1) y \geq 3 \implies 2y \geq 6 \implies 6 -2y \leq 0 . So what can you say about |6 -2y|?

    2) x < 0 \implies x - 2 < 0 and x > -2 \implies x + 3 > 0 . So what can you say about |x+3|- |x-2|?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Algebraic expressions
    Posted in the Algebra Forum
    Replies: 7
    Last Post: March 20th 2011, 09:27 AM
  2. simplyfing expressions?
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 12th 2010, 03:09 PM
  3. Combining skills : Simplyfing Expressions.
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 8th 2010, 08:57 PM
  4. algebraic expressions
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 3rd 2009, 05:52 PM
  5. Simplyfing algebraic expressions
    Posted in the Algebra Forum
    Replies: 1
    Last Post: April 11th 2007, 06:16 PM

Search Tags


/mathhelpforum @mathhelpforum