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Math Help - [SOLVED] equation help

  1. #1
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    [SOLVED] equation help

    3x + 4 = 0
    any help would be excellent thanks
    Last edited by gracey; December 18th 2007 at 11:15 AM.
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  2. #2
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    two methods

    if you are fimmilar with completing the sqaure

    x^2-5x = (x- \frac{5}{2})^2 - ( \frac{5}{2})^2

    it should be obvious that you will get a minimum when x- \frac{5}{2} = 0

    can you finish it form there ?

    for the second part, if your draw a reasonable sketch of the of the graph it should be obvious.
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  3. #3
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    thanks
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