Results 1 to 2 of 2

Math Help - Please Help Me with a couple of short questions on INEQUALITIES.

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    1

    Please Help Me with a couple of short questions on INEQUALITIES.

    1) Find the range of values of k that give this equation no real roots.
    a) (k + 1)x^2 + 4kx + 9 = 0

    2) Show that x^2 + 2kx + 9 is >/ (more than or equal to) 0 for all real values of x, if k^2 /< (is less than or equal to) 9


    Thank you very much - if you can show your workings to help me understand I'd be really grateful!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Nov 2009
    Posts
    63
    Quote Originally Posted by heidithompson1990 View Post
    1) Find the range of values of k that give this equation no real roots.
    a) (k + 1)x^2 + 4kx + 9 = 0

    2) Show that x^2 + 2kx + 9 is >/ (more than or equal to) 0 for all real values of x, if k^2 /< (is less than or equal to) 9


    Thank you very much - if you can show your workings to help me understand I'd be really grateful!
    a)
    from the equation (k + 1)x^2 + 4kx + 9 = 0
    you can get the value of a, b and c...
    next step, you just verify that b^2-4(a)(c)<0

    .....hope it help........
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Two short questions on vectors
    Posted in the Advanced Algebra Forum
    Replies: 8
    Last Post: October 15th 2010, 04:16 PM
  2. Two short Questions
    Posted in the Trigonometry Forum
    Replies: 2
    Last Post: February 1st 2010, 04:36 AM
  3. two short questions
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: September 28th 2008, 06:38 AM
  4. 3 short questions
    Posted in the Pre-Calculus Forum
    Replies: 8
    Last Post: September 23rd 2008, 08:39 AM
  5. Short Triple Integration questions
    Posted in the Calculus Forum
    Replies: 6
    Last Post: August 30th 2006, 11:54 AM

Search Tags


/mathhelpforum @mathhelpforum