Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding this set of values for x

  1. Jan 1, 2008 #1
    Solve these simultaneous equations
    y = -2x + 5
    [tex]y = 2x^{2}-3x -16 = 0 [/tex]

    I did that and got these pairs (which i checked are right)
    x = 7/2, y = -2
    x = -3, y = 11

    Now the second part of the question is Hence, or otherwise, find the set of values of x which

    [tex]y = 2x^{2}-3x -16 = > 5 - 2x [/tex]

    I dont know how to go about doing this last bit
  2. jcsd
  3. Jan 1, 2008 #2


    User Avatar
    Homework Helper
    Education Advisor
    Gold Member

    Initial steps for your inequality are to find the expression related to zero using the properties/axioms of inequality and find the critical points of x which satisfy the equality of 'expression' = 0.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Finding this set of values for x
  1. Finding x. (Replies: 9)

  2. F(x)=1/x closed set? (Replies: 4)