Results 1 to 4 of 4

Math Help - inequality

  1. #1
    Newbie
    Joined
    Jun 2010
    Posts
    2

    inequality

    Hello!
    Please help me to solve this inequality!
    p(x^2+2)<2x^2+6x+1, if p is parameter!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    You want to solve for x?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jun 2010
    Posts
    2
    yes!
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Do you know the quadratic formula?

    When you have ax^2+bx+c=0,x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

    In your case.

    p(x^2+2)<2x^2+6x+1

    px^2+2p<2x^2+6x+1

    0<2x^2-px^2+6x+1-2p

    2x^2-px^2+6x+1-2p<0

    (2-p)x^2+6x+1-2p<0

    Now use a = 2-p, b=6, c = 1-2p into the quadratic formula
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: January 11th 2011, 08:20 PM
  2. Replies: 3
    Last Post: December 12th 2010, 01:16 PM
  3. inequality
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: July 26th 2010, 04:34 AM
  4. inequality
    Posted in the Algebra Forum
    Replies: 4
    Last Post: July 24th 2010, 12:08 PM
  5. Inequality
    Posted in the Algebra Forum
    Replies: 0
    Last Post: October 8th 2009, 03:06 AM

Search Tags


/mathhelpforum @mathhelpforum