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Math Help - Solve this quadratic equation

  1. #1
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    Solve this quadratic equation

    1. Solve the quadratic equation x^2 -2x -1 = 0


    2. If f(x) = 3x^2 -2x + 4 nd f(x + h) -f(x)

    Thanks!
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  2. #2
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by fyremelody View Post
    1. Solve the quadratic equation x^2 -2x -1 = 0


    2. If f(x) = 3x^2 -2x + 4 nd f(x + h) -f(x)

    Thanks!
    Don't use all those tags, it's impossible to see what you've done

    x = \frac{-b\pm \sqrt{b^2-4ac}}{2a}

    Doesn't seem to be much of a problem, both these questions can be solved using the quadratic formula.

    For the second part of Q2: f(x+h) = [3(x+h)^2 - 2(x+h) + 4] - 3x^2-2x+4

    Tidy up the algebra and find x in terms of h using the quadratic formula.
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