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Math Help - Graph Equation

  1. #1
    Member GAdams's Avatar
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    Graph Equation

    (a) I got 2x^2 - 9x + 4 = 0

    (b) I can't do

    (c) x = 1/2 or x = 4
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by GAdams View Post
    (a) I got 2x^2 - 9x + 4 = 0

    (b) I can't do

    (c) x = 1/2 or x = 4
    For a)

    Simply multiply through with  x and take all the terms over to the left hand side of the equal sign.

    ------------------

    For b)

     xy = 4 ----- (1)


     2x^2 - 9x + 4 = 0
     -(2x^2 - 9x) = 4  ------- (2)


    Set (1) = (2)


     -(2x^2 - 9x) = xy

     y = -(2x - 9)

     y = -2x + 9

    ------------------
    For c)

     2x^2 - 9x + 4 = 0

     (2x - 1)(x - 4) = 0

     x = \frac{1}{2} \ or \ x = 4
    Last edited by janvdl; July 8th 2007 at 05:09 AM.
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