Results 1 to 4 of 4

Math Help - rational expression

  1. #1
    Senior Member
    Joined
    Oct 2008
    Posts
    323

    rational expression

    simplify.

    1. (x^2+3)/x^2 + (x-1)/5

    I get (x+2)/5, is this correct?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    11
    Awards
    1
    Quote Originally Posted by william View Post
    simplify.

    1. x^2+3/x^2 + x-1/5
    We're gonna need some parentheses to know what is in the numerator and denominator. This is too ambiguous.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Oct 2008
    Posts
    323
    Quote Originally Posted by masters View Post
    We're gonna need some parentheses to know what is in the numerator and denominator. This is too ambiguous.
    I have edited the OP, is it more clear?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    11
    Awards
    1
    Quote Originally Posted by william View Post
    simplify.

    1. (x^2+3)/x^2 + (x-1)/5

    I get (x+2)/5, is this correct?
    I don't know how you arrived at your conclusion so I don't know where to correct you. If you're simplifying by putting everything over one denominator, then we need an LCD.

    That would be 5x^2

    \frac{x^2+3}{x^2}+\frac{x-1}{5}=\frac{5x^2\left(\frac{x^2+3}{x^2}\right)+5x^  2\left(\frac{x-1}{5}\right)}{5x^2}=\frac{5x^2+15+x^3-x^2}{5x^2}=\frac{x^3-4x^2+15}{5x^2}
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. rational expression
    Posted in the Algebra Forum
    Replies: 2
    Last Post: August 12th 2010, 06:19 AM
  2. Replies: 2
    Last Post: December 8th 2009, 06:48 AM
  3. Rational Expression
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: October 23rd 2008, 12:15 PM
  4. Rational expression
    Posted in the Algebra Forum
    Replies: 9
    Last Post: May 4th 2008, 10:20 AM
  5. Rational Expression
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: March 9th 2008, 03:57 PM

Search Tags


/mathhelpforum @mathhelpforum