Results 1 to 7 of 7

Math Help - Inequality help needed!

  1. #1
    Newbie
    Joined
    Sep 2009
    Posts
    4

    Inequality help needed!

    I've tried and tried but I can't solve these two inequalities
    Would you please help me, I'd really appreciate it

    X^2 + X - 2 < 0

    and:

    5X - 2 > 0
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member
    Joined
    Jul 2009
    Posts
    397
    Hi BobbyJean

    Are there 2 separate questions or just one question consists of 2 inequalities?

    Anyway, can you fatorise X^2 + X - 2, then find the critical values, then find the range where X^2 + X - 2 < 0
    Follow Math Help Forum on Facebook and Google+

  3. #3
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by BobbyJean View Post
    I've tried and tried but I can't solve these two inequalities
    Would you please help me, I'd really appreciate it

    X^2 + X - 2 < 0

    and:

    5X - 2 > 0
    1. factor

    2. solve like an equation

    Do you know how to factor?

    EG x^2+3x+2>0

    (x+2)(x+1)>0

    This means that the only way the statement is true is if x is anything but in
    [-2,-1].
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Newbie
    Joined
    Sep 2009
    Posts
    4
    Quote Originally Posted by songoku View Post
    Hi BobbyJean

    Are there 2 separate questions or just one question consists of 2 inequalities?

    Anyway, can you fatorise X^2 + X - 2, then find the critical values, then find the range where X^2 + X - 2 < 0

    These are two separate questions and I can't solve them
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Senior Member
    Joined
    Jul 2009
    Posts
    397
    Hi BobbyJean

    Well, you've been given hints. First step, can you factorise X^2 + X - 2 ?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Newbie
    Joined
    Sep 2009
    Posts
    4
    Quote Originally Posted by songoku View Post
    Hi BobbyJean

    Well, you've been given hints. First step, can you factorise X^2 + X - 2 ?

    No I can't
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Senior Member
    Joined
    Jul 2009
    Posts
    397
    Hi BobbyJean

    Maybe this will help :College Algebra Tutorial on Factoring Polynomials
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: February 16th 2011, 05:26 PM
  2. Replies: 3
    Last Post: December 12th 2010, 01:16 PM
  3. Inequality with logarithm, help needed
    Posted in the Algebra Forum
    Replies: 4
    Last Post: August 15th 2010, 05:15 AM
  4. Inequality with logarithm help needed.
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: July 24th 2009, 04:15 AM
  5. Proof needed for an inequality involving definite integrals
    Posted in the Advanced Math Topics Forum
    Replies: 0
    Last Post: February 10th 2009, 10:00 AM

Search Tags


/mathhelpforum @mathhelpforum